USCG Second Mate / Third Mate Unlimited
Tonnage Exam | Practice Exam Q&A
ID14117
,USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
1. An electrical protective device trips repeatedly. With respect to Fire 10. A pollution-prevention control is compromised during operations. Which action
prevention, firefighting, damage control and abandonment procedures, what is the is most likely to prevent recurrence of a problem involving MARPOL principles?
best FIRST action? A. Make an unverified ballast change solely to improve trim.
A. Protect the plant, verify the indication and diagnose the affected system before B. Depart with required safety equipment inoperative because the voyage is short.
resetting or increasing load. C. Discharge a small contaminant amount rather than initiating the response procedure.
B. Disable an alarm that is interrupting operations. D. Verify the loading and stability data before accepting a cargo or ballast change,
C. Reset a protective trip repeatedly without finding the cause. then confirm that the corrective action is effective before closure.
D. Increase machinery load to see whether the abnormal indication clears. Correct Answer: D
Correct Answer: A Explanation: This is the most appropriate option because it connects the observed
Explanation: A defensible professional decision should be based on current evidence and condition to the governing requirement and leaves a record of why the decision was made.
applicable criteria. The other choices rely on assumption, remove safeguards, or change
conditions before the cause is understood.
11. Required lifesaving equipment is not ready before departure. Which sequence
is most appropriate when carrying out environmental protection?
2. A pollution-prevention control is compromised during operations. Which A. Continue the transfer until the planned quantity is complete.
evidence is most important when evaluating Fire prevention? B. Depart with required safety equipment unavailable because conditions are calm.
A. Depart with required safety equipment inoperative because the voyage is short. C. Wash a small spill overboard rather than initiating the response process.
B. Review required safety equipment and readiness before departure and compare the D. Stop or control the operation, protect personnel and follow the required emergency
findings with the applicable criteria. or pollution-response procedure, then verify the resulting state before moving to the
C. Discharge a small contaminant amount rather than initiating the response procedure. next step.
D. Make an unverified ballast change solely to improve trim. Correct Answer: D
Correct Answer: B Explanation: The correct choice follows a verify-act-confirm sequence. That is more
Explanation: This is the most appropriate option because it connects the observed reliable than bypassing controls or making multiple uncontrolled changes.
condition to the governing requirement and leaves a record of why the decision was made.
12. The vessel approaches a traffic or pilotage constraint; a target bearing
3. A machinery temperature rises above its normal operating trend. Which response remains nearly constant as range decreases. Which choice demonstrates the
best controls the primary risk associated with damage control? strongest control of STCW competence, drills, records and professional
A. Reset a protective trip repeatedly without finding the cause. watchkeeping standards?
B. Protect the plant, verify the indication and diagnose the affected system before A. Make a series of small course changes that are difficult to detect.
resetting or increasing load. B. Rely on one electronic source when independent information conflicts.
C. Disable an alarm that is interrupting operations. C. Cross-check position, traffic and navigation sources before altering the passage
D. Make several plant changes simultaneously before recording the original condition. plan.
Correct Answer: B D. Assume there is no risk because the other vessel is visually small.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: C
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for STCW
4. An alarm occurs during machinery operation; a target bearing remains nearly
competence, drills, records and professional watchkeeping standards.
constant as range decreases. Before proceeding with work involving abandonment
procedures, what should be verified? 13. A stability calculation is required after cargo or ballast changes. What is
A. Review stability data, loading condition and free-surface effects and compare the required before accepting the result related to STCW competence?
findings with the applicable criteria. A. Review weather, tide/current, under-keel clearance and route hazards and compare
B. Make an unverified ballast change solely to improve trim. the findings with the applicable criteria.
C. Depart with required safety equipment inoperative because the voyage is short. B. Use a single navigation source after another source shows a material discrepancy.
D. Discharge a small contaminant amount rather than initiating the response procedure. C. Assume constant bearing is harmless when range is decreasing.
Correct Answer: A D. Silence a machinery alarm and continue at the same load without investigation.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: A
checks the relevant condition, and then acts within the defined requirements for Explanation: The correct response protects the integrity of the process: establish the
abandonment procedures. facts, apply the appropriate control, and verify the result before closure.
5. An alarm appears after a change in plant configuration. Which troubleshooting 14. A position fix disagrees with the expected track. Under these conditions,
approach is most appropriate for Marine engineering or electrical systems when should the issue involving professional watchkeeping standards be escalated?
applicable to the named officer/module? A. Rely on one electronic source when independent information conflicts.
A. Disable an alarm that is interrupting operations. B. Make a series of small course changes that are difficult to detect.
B. Reset a protective trip repeatedly without finding the cause. C. Cross-check position, traffic and navigation sources before altering the passage
C. Increase machinery load to see whether the abnormal indication clears. plan.
D. Protect the plant, verify the indication and diagnose the affected system before D. Continue on an uncertain position until the next scheduled fix.
resetting or increasing load. Correct Answer: C
Correct Answer: D Explanation: This approach preserves control of the situation while producing evidence
Explanation: The correct response protects the integrity of the process: establish the that can confirm whether the action actually corrected the issue involving professional
facts, apply the appropriate control, and verify the result before closure. watchkeeping standards.
6. An electrical protective device trips repeatedly. Which action best supports a 15. A stability calculation is required after cargo or ballast changes. Which
defensible decision about Marine engineering? comparison is most useful for interpreting Communications, GMDSS awareness and
A. Make several plant changes simultaneously before recording the original condition. distress/urgency procedures?
B. Increase machinery load to see whether the abnormal indication clears. A. Silence a machinery alarm and continue at the same load without investigation.
C. Compare operating pressures/temperatures, equipment status and recent changes to B. Review machinery pressures, temperatures, alarms and operating limits and compare
isolate the fault safely. the findings with the applicable criteria.
D. Disable an alarm that is interrupting operations. C. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C D. Assume constant bearing is harmless when range is decreasing.
Explanation: This approach preserves control of the situation while producing evidence Correct Answer: B
that can confirm whether the action actually corrected the issue involving Marine Explanation: This answer uses verified evidence before action, which reduces the chance
engineering. of masking the real problem and supports a traceable decision about Communications,
GMDSS awareness and distress/urgency procedures.
7. A vessel must plan a passage through constrained waters. A change affecting
electrical systems applicable to the named officer/module is being considered. 16. An alarm occurs during machinery operation; a target bearing remains nearly
How should it be handled? constant as range decreases. Which action best distinguishes the underlying cause
A. Use a single navigation source after another source shows a material discrepancy. from a symptom in GMDSS awareness?
B. Assume constant bearing is harmless when range is decreasing. A. Verify the loading and stability data before accepting a cargo or ballast change,
C. Respond to an abnormal machinery indication by protecting the plant, confirming the then confirm that the corrective action is effective before closure.
indication and following the operating procedure. B. Make an unverified ballast change solely to improve trim.
D. Silence a machinery alarm and continue at the same load without investigation. C. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: C D. Discharge a small contaminant amount rather than initiating the response procedure.
Explanation: This answer uses verified evidence before action, which reduces the chance Correct Answer: A
of masking the real problem and supports a traceable decision about electrical systems Explanation: The selected action best supports safe, compliant, and technically sound
applicable to the named officer/module. performance because it addresses GMDSS awareness using observable evidence rather than
convenience.
8. Required lifesaving equipment is not ready before departure; a machinery
temperature rises 20 C above its normal trend. The abnormal condition directly 17. An engineering watch observes an abnormal temperature or pressure. Which
affects Pollution prevention, MARPOL principles and environmental protection. response is most consistent with the professional or compliance requirements
What is the most appropriate response? governing distress/urgency procedures?
A. Enter an enclosed space based only on a prior atmosphere test. A. Assume constant bearing is harmless when range is decreasing.
B. Wash a small spill overboard rather than initiating the response process. B. Respond to an abnormal machinery indication by protecting the plant, confirming the
C. Correct a required safety-equipment deficiency and verify readiness before indication and following the operating procedure.
proceeding. C. Silence a machinery alarm and continue at the same load without investigation.
D. Continue the transfer until the planned quantity is complete. D. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C Correct Answer: B
Explanation: The selected action best supports safe, compliant, and technically sound Explanation: A defensible professional decision should be based on current evidence and
performance because it addresses Pollution prevention, MARPOL principles and applicable criteria. The other choices rely on assumption, remove safeguards, or change
environmental protection using observable evidence rather than convenience. conditions before the cause is understood.
9. An enclosed-space task is proposed without a completed entry check. Which 18. The vessel approaches a traffic or pilotage constraint. Which handoff
documentation approach best supports traceability for Pollution prevention? practice best reduces error risk for Collision avoidance, maneuvering, pilotage
A. Record the observed condition, supporting evidence, decision and responsible and restricted-water operations?
follow-up; communicate any unresolved risk to the next responsible person. A. Rely on one electronic source when independent information conflicts.
B. Depart with required safety equipment unavailable because conditions are calm. B. Make a series of small course changes that are difficult to detect.
C. Continue the transfer until the planned quantity is complete. C. Continue on an uncertain position until the next scheduled fix.
D. Enter an enclosed space based only on a prior atmosphere test. D. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: A follow-up; communicate any unresolved risk to the next responsible person.
Explanation: A defensible professional decision should be based on current evidence and Correct Answer: D
applicable criteria. The other choices rely on assumption, remove safeguards, or change Explanation: This is the most appropriate option because it connects the observed
conditions before the cause is understood. condition to the governing requirement and leaves a record of why the decision was made.
1
,USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
19. A position fix disagrees with the expected track. Which decision about 28. The vessel approaches a traffic or pilotage constraint; a machinery
Collision avoidance is best supported by the available evidence? temperature rises 20 C above its normal trend. The abnormal condition directly
A. Assume there is no risk because the other vessel is visually small. affects Meteorology, tides, currents and environmental conditions affecting safe
B. Continue on an uncertain position until the next scheduled fix. navigation. What is the most appropriate response?
C. Rely on one electronic source when independent information conflicts. A. Make a series of small course changes that are difficult to detect.
D. Use all available means to determine collision risk and take early, substantial B. Rely on one electronic source when independent information conflicts.
action consistent with the applicable navigation rules. C. Cross-check position, traffic and navigation sources before altering the passage
Correct Answer: D plan.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more D. Assume there is no risk because the other vessel is visually small.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: C
Explanation: The strongest exam-style response is the one that controls immediate risk,
20. A pre-departure check identifies a safety-equipment deficiency; a navigation
checks the relevant condition, and then acts within the defined requirements for
fix differs by 0.8 nautical mile from another source. Which review step adds the Meteorology, tides, currents and environmental conditions affecting safe navigation.
most value before closing work involving restricted-water operations?
A. Depart with required safety equipment inoperative because the voyage is short. 29. Another vessel remains on nearly constant bearing while range decreases.
B. Discharge a small contaminant amount rather than initiating the response procedure. Which documentation approach best supports traceability for environmental
C. Make an unverified ballast change solely to improve trim. conditions affecting safe navigation?
D. Verify the loading and stability data before accepting a cargo or ballast change, A. Continue on an uncertain position until the next scheduled fix.
then confirm that the corrective action is effective before closure. B. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: D follow-up; communicate any unresolved risk to the next responsible person.
Explanation: The strongest exam-style response is the one that controls immediate risk, C. Assume there is no risk because the other vessel is visually small.
checks the relevant condition, and then acts within the defined requirements for D. Make a series of small course changes that are difficult to detect.
restricted-water operations. Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the
21. Another vessel remains on nearly constant bearing while range decreases. With
facts, apply the appropriate control, and verify the result before closure.
respect to Navigation rules, watchkeeping responsibilities and bridge resource
management, what is the best FIRST action? 30. Ballast is proposed to correct a list. Which action is most likely to prevent
A. Use all available means to determine collision risk and take early, substantial recurrence of a problem involving Ship stability, trim, loading and basic
action consistent with the applicable navigation rules. stability calculations?
B. Continue on an uncertain position until the next scheduled fix. A. Accept a loading condition based only on even draft readings.
C. Assume there is no risk because the other vessel is visually small. B. Ignore slack-tank effects because total liquid weight is unchanged.
D. Make a series of small course changes that are difficult to detect. C. Account for free-surface and weight-shift effects when evaluating stability and
Correct Answer: A trim, then confirm that the corrective action is effective before closure.
Explanation: The correct response protects the integrity of the process: establish the D. Move heavy cargo higher to free lower deck space without recalculation.
facts, apply the appropriate control, and verify the result before closure. Correct Answer: C
Explanation: This approach preserves control of the situation while producing evidence
22. A position fix disagrees with the expected track. Which evidence is most
that can confirm whether the action actually corrected the issue involving Ship
important when evaluating Navigation rules? stability, trim, loading and basic stability calculations.
A. Review position sources, charted hazards, depth/under-keel clearance and traffic
and compare the findings with the applicable criteria. 31. A slack tank creates additional free-surface effect. Which sequence is most
B. Rely on one electronic source when independent information conflicts. appropriate when carrying out Ship stability?
C. Make a series of small course changes that are difficult to detect. A. Correct a list by moving weight without checking stability impact.
D. Continue on an uncertain position until the next scheduled fix. B. Recalculate the relevant stability condition before accepting the loading or
Correct Answer: A ballast change, then verify the resulting state before moving to the next step.
Explanation: This approach preserves control of the situation while producing evidence C. Move heavy cargo higher to free lower deck space without recalculation.
that can confirm whether the action actually corrected the issue involving Navigation D. Accept a loading condition based only on even draft readings.
rules. Correct Answer: B
Explanation: This answer uses verified evidence before action, which reduces the chance
23. A position fix disagrees with the expected track. Which response best
of masking the real problem and supports a traceable decision about Ship stability.
controls the primary risk associated with watchkeeping responsibilities?
A. Assume there is no risk because the other vessel is visually small. 32. Ballast is proposed to correct a list; visibility falls below one nautical
B. Continue on an uncertain position until the next scheduled fix. mile. Which choice demonstrates the strongest control of basic stability
C. Use all available means to determine collision risk and take early, substantial calculations?
action consistent with the applicable navigation rules. A. Account for free-surface and weight-shift effects when evaluating stability and
D. Rely on one electronic source when independent information conflicts. trim.
Correct Answer: C B. Ignore slack-tank effects because total liquid weight is unchanged.
Explanation: This answer uses verified evidence before action, which reduces the chance C. Accept a loading condition based only on even draft readings.
of masking the real problem and supports a traceable decision about watchkeeping D. Correct a list by moving weight without checking stability impact.
responsibilities. Correct Answer: A
24. A deck watch detects a change in bearing to another vessel; a target bearing Explanation: The selected action best supports safe, compliant, and technically sound
performance because it addresses basic stability calculations using observable evidence
remains nearly constant as range decreases. Before proceeding with work involving
rather than convenience.
bridge resource management, what should be verified?
A. Review pollution-prevention requirements and the condition of containment systems 33. An electrical protective device trips repeatedly. What is required before
and compare the findings with the applicable criteria. accepting the result related to Fire prevention, firefighting, damage control and
B. Discharge a small contaminant amount rather than initiating the response procedure. abandonment procedures?
C. Make an unverified ballast change solely to improve trim. A. Disable an alarm that is interrupting operations.
D. Depart with required safety equipment inoperative because the voyage is short. B. Reset a protective trip repeatedly without finding the cause.
Correct Answer: A C. Increase machinery load to see whether the abnormal indication clears.
Explanation: The selected action best supports safe, compliant, and technically sound D. Review pressure, temperature, lubrication, electrical load, alarm history and
performance because it addresses bridge resource management using observable evidence equipment status and compare the findings with the applicable criteria.
rather than convenience. Correct Answer: D
25. A towing or deck operation is affected by changing weather. Which Explanation: A defensible professional decision should be based on current evidence and
applicable criteria. The other choices rely on assumption, remove safeguards, or change
troubleshooting approach is most appropriate for Chartwork, publications, voyage
conditions before the cause is understood.
planning and position fixing?
A. Respond to an abnormal machinery indication by protecting the plant, confirming the 34. A deck watch detects a change in bearing to another vessel. Under these
indication and following the operating procedure. conditions, when should the issue involving Fire prevention be escalated?
B. Use a single navigation source after another source shows a material discrepancy. A. Contain and report a pollution risk using the required onboard response and
C. Assume constant bearing is harmless when range is decreasing. documentation process.
D. Silence a machinery alarm and continue at the same load without investigation. B. Make an unverified ballast change solely to improve trim.
Correct Answer: A C. Depart with required safety equipment inoperative because the voyage is short.
Explanation: A defensible professional decision should be based on current evidence and D. Discharge a small contaminant amount rather than initiating the response procedure.
applicable criteria. The other choices rely on assumption, remove safeguards, or change Correct Answer: A
conditions before the cause is understood. Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made.
26. A deck watch detects a change in bearing to another vessel. Which action best
supports a defensible decision about voyage planning? 35. A machinery temperature rises above its normal operating trend. Which
A. Depart with required safety equipment inoperative because the voyage is short. comparison is most useful for interpreting damage control?
B. Discharge a small contaminant amount rather than initiating the response procedure. A. Reset a protective trip repeatedly without finding the cause.
C. Contain and report a pollution risk using the required onboard response and B. Disable an alarm that is interrupting operations.
documentation process. C. Make several plant changes simultaneously before recording the original condition.
D. Make an unverified ballast change solely to improve trim. D. Review pressure, temperature, lubrication, electrical load, alarm history and
Correct Answer: C equipment status and compare the findings with the applicable criteria.
Explanation: This is the most appropriate option because it connects the observed Correct Answer: D
condition to the governing requirement and leaves a record of why the decision was made. Explanation: The correct choice follows a verify-act-confirm sequence. That is more
reliable than bypassing controls or making multiple uncontrolled changes.
27. An alarm occurs during machinery operation. A change affecting position
fixing is being considered. How should it be handled? 36. A navigation fix does not agree with another available source; the vessel
A. Respond to an abnormal machinery indication by protecting the plant, confirming the draft increases after cargo loading. Which action best distinguishes the
indication and following the operating procedure. underlying cause from a symptom in abandonment procedures?
B. Silence a machinery alarm and continue at the same load without investigation. A. Discharge a small contaminant amount rather than initiating the response procedure.
C. Use a single navigation source after another source shows a material discrepancy. B. Verify the loading and stability data before accepting a cargo or ballast change,
D. Assume constant bearing is harmless when range is decreasing. then confirm that the corrective action is effective before closure.
Correct Answer: A C. Make an unverified ballast change solely to improve trim.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more D. Depart with required safety equipment inoperative because the voyage is short.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: B
Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
abandonment procedures.
2
, USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
37. An alarm appears after a change in plant configuration. Which response is 46. A position fix disagrees with the expected track. Which action best supports
most consistent with the professional or compliance requirements governing Marine a defensible decision about professional watchkeeping standards?
engineering or electrical systems applicable to the named officer/module? A. Cross-check position, traffic and navigation sources before altering the passage
A. Disable an alarm that is interrupting operations. plan.
B. Protect the plant, verify the indication and diagnose the affected system before B. Rely on one electronic source when independent information conflicts.
resetting or increasing load. C. Make a series of small course changes that are difficult to detect.
C. Reset a protective trip repeatedly without finding the cause. D. Continue on an uncertain position until the next scheduled fix.
D. Increase machinery load to see whether the abnormal indication clears. Correct Answer: A
Correct Answer: B Explanation: This approach preserves control of the situation while producing evidence
Explanation: The correct response protects the integrity of the process: establish the that can confirm whether the action actually corrected the issue involving professional
facts, apply the appropriate control, and verify the result before closure. watchkeeping standards.
38. An electrical protective device trips repeatedly. Which handoff practice best 47. A pre-departure check identifies a safety-equipment deficiency. A change
reduces error risk for Marine engineering? affecting Communications, GMDSS awareness and distress/urgency procedures is
A. Make several plant changes simultaneously before recording the original condition. being considered. How should it be handled?
B. Increase machinery load to see whether the abnormal indication clears. A. Assume constant bearing is harmless when range is decreasing.
C. Record the observed condition, supporting evidence, decision and responsible B. Silence a machinery alarm and continue at the same load without investigation.
follow-up; communicate any unresolved risk to the next responsible person. C. Respond to an abnormal machinery indication by protecting the plant, confirming the
D. Disable an alarm that is interrupting operations. indication and following the operating procedure.
Correct Answer: C D. Use a single navigation source after another source shows a material discrepancy.
Explanation: This approach preserves control of the situation while producing evidence Correct Answer: C
that can confirm whether the action actually corrected the issue involving Marine Explanation: This answer uses verified evidence before action, which reduces the chance
engineering. of masking the real problem and supports a traceable decision about Communications,
GMDSS awareness and distress/urgency procedures.
39. A towing or deck operation is affected by changing weather. Which decision
about electrical systems applicable to the named officer/module is best supported 48. A navigation fix does not agree with another available source; the vessel
by the available evidence? draft increases after cargo loading. The abnormal condition directly affects
A. Silence a machinery alarm and continue at the same load without investigation. GMDSS awareness. What is the most appropriate response?
B. Use a single navigation source after another source shows a material discrepancy. A. Discharge a small contaminant amount rather than initiating the response procedure.
C. Assume constant bearing is harmless when range is decreasing. B. Contain and report a pollution risk using the required onboard response and
D. Respond to an abnormal machinery indication by protecting the plant, confirming the documentation process.
indication and following the operating procedure. C. Make an unverified ballast change solely to improve trim.
Correct Answer: D D. Depart with required safety equipment inoperative because the voyage is short.
Explanation: This answer uses verified evidence before action, which reduces the chance Correct Answer: B
of masking the real problem and supports a traceable decision about electrical systems Explanation: The selected action best supports safe, compliant, and technically sound
applicable to the named officer/module. performance because it addresses GMDSS awareness using observable evidence rather than
convenience.
40. Required lifesaving equipment is not ready before departure; a navigation fix
differs by 0.8 nautical mile from another source. Which review step adds the most 49. A vessel must plan a passage through constrained waters. Which documentation
value before closing work involving Pollution prevention, MARPOL principles and approach best supports traceability for distress/urgency procedures?
environmental protection? A. Use a single navigation source after another source shows a material discrepancy.
A. Enter an enclosed space based only on a prior atmosphere test. B. Record the observed condition, supporting evidence, decision and responsible
B. Wash a small spill overboard rather than initiating the response process. follow-up; communicate any unresolved risk to the next responsible person.
C. Correct a required safety-equipment deficiency and verify readiness before C. Assume constant bearing is harmless when range is decreasing.
proceeding, then confirm that the corrective action is effective before closure. D. Silence a machinery alarm and continue at the same load without investigation.
D. Continue the transfer until the planned quantity is complete. Correct Answer: B
Correct Answer: C Explanation: A defensible professional decision should be based on current evidence and
Explanation: The selected action best supports safe, compliant, and technically sound applicable criteria. The other choices rely on assumption, remove safeguards, or change
performance because it addresses Pollution prevention, MARPOL principles and conditions before the cause is understood.
environmental protection using observable evidence rather than convenience.
50. The vessel approaches a traffic or pilotage constraint. Which action is most
41. An enclosed-space task is proposed without a completed entry check. With likely to prevent recurrence of a problem involving Collision avoidance,
respect to Pollution prevention, what is the best FIRST action? maneuvering, pilotage and restricted-water operations?
A. Stop or control the operation, protect personnel and follow the required emergency A. Cross-check position, traffic and navigation sources before altering the passage
or pollution-response procedure. plan, then confirm that the corrective action is effective before closure.
B. Depart with required safety equipment unavailable because conditions are calm. B. Rely on one electronic source when independent information conflicts.
C. Continue the transfer until the planned quantity is complete. C. Make a series of small course changes that are difficult to detect.
D. Enter an enclosed space based only on a prior atmosphere test. D. Continue on an uncertain position until the next scheduled fix.
Correct Answer: A Correct Answer: A
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
51. A position fix disagrees with the expected track. Which sequence is most
42. A deck watch detects a change in bearing to another vessel. Which evidence is appropriate when carrying out Collision avoidance?
most important when evaluating MARPOL principles? A. Assume there is no risk because the other vessel is visually small.
A. Review pollution-prevention requirements and the condition of containment systems B. Continue on an uncertain position until the next scheduled fix.
and compare the findings with the applicable criteria. C. Rely on one electronic source when independent information conflicts.
B. Discharge a small contaminant amount rather than initiating the response procedure. D. Use all available means to determine collision risk and take early, substantial
C. Make an unverified ballast change solely to improve trim. action consistent with the applicable navigation rules, then verify the resulting
D. Depart with required safety equipment inoperative because the voyage is short. state before moving to the next step.
Correct Answer: A Correct Answer: D
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
43. Required lifesaving equipment is not ready before departure. Which response 52. An alarm occurs during machinery operation; a target bearing remains nearly
best controls the primary risk associated with environmental protection? constant as range decreases. Which choice demonstrates the strongest control of
A. Continue the transfer until the planned quantity is complete. restricted-water operations?
B. Depart with required safety equipment unavailable because conditions are calm. A. Make an unverified ballast change solely to improve trim.
C. Stop or control the operation, protect personnel and follow the required emergency B. Contain and report a pollution risk using the required onboard response and
or pollution-response procedure. documentation process.
D. Wash a small spill overboard rather than initiating the response process. C. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: C D. Discharge a small contaminant amount rather than initiating the response procedure.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: B
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
44. The vessel approaches a traffic or pilotage constraint; the vessel draft restricted-water operations.
increases after cargo loading. Before proceeding with work involving STCW
competence, drills, records and professional watchkeeping standards, what should 53. Another vessel remains on nearly constant bearing while range decreases. What
be verified? is required before accepting the result related to Navigation rules, watchkeeping
A. Review position sources, charted hazards, depth/under-keel clearance and traffic responsibilities and bridge resource management?
and compare the findings with the applicable criteria. A. Review bearing/range trend, own-ship course/speed, target aspect and applicable
B. Make a series of small course changes that are difficult to detect. rule and compare the findings with the applicable criteria.
C. Rely on one electronic source when independent information conflicts. B. Continue on an uncertain position until the next scheduled fix.
D. Assume there is no risk because the other vessel is visually small. C. Assume there is no risk because the other vessel is visually small.
Correct Answer: A D. Make a series of small course changes that are difficult to detect.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: A
checks the relevant condition, and then acts within the defined requirements for STCW Explanation: The correct response protects the integrity of the process: establish the
competence, drills, records and professional watchkeeping standards. facts, apply the appropriate control, and verify the result before closure.
45. A pre-departure check identifies a safety-equipment deficiency. Which 54. A position fix disagrees with the expected track. Under these conditions,
troubleshooting approach is most appropriate for STCW competence? when should the issue involving Navigation rules be escalated?
A. Silence a machinery alarm and continue at the same load without investigation. A. Rely on one electronic source when independent information conflicts.
B. Respond to an abnormal machinery indication by protecting the plant, confirming the B. Cross-check position, traffic and navigation sources before altering the passage
indication and following the operating procedure. plan.
C. Use a single navigation source after another source shows a material discrepancy. C. Make a series of small course changes that are difficult to detect.
D. Assume constant bearing is harmless when range is decreasing. D. Continue on an uncertain position until the next scheduled fix.
Correct Answer: B Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving Navigation
rules.
3
Tonnage Exam | Practice Exam Q&A
ID14117
,USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
1. An electrical protective device trips repeatedly. With respect to Fire 10. A pollution-prevention control is compromised during operations. Which action
prevention, firefighting, damage control and abandonment procedures, what is the is most likely to prevent recurrence of a problem involving MARPOL principles?
best FIRST action? A. Make an unverified ballast change solely to improve trim.
A. Protect the plant, verify the indication and diagnose the affected system before B. Depart with required safety equipment inoperative because the voyage is short.
resetting or increasing load. C. Discharge a small contaminant amount rather than initiating the response procedure.
B. Disable an alarm that is interrupting operations. D. Verify the loading and stability data before accepting a cargo or ballast change,
C. Reset a protective trip repeatedly without finding the cause. then confirm that the corrective action is effective before closure.
D. Increase machinery load to see whether the abnormal indication clears. Correct Answer: D
Correct Answer: A Explanation: This is the most appropriate option because it connects the observed
Explanation: A defensible professional decision should be based on current evidence and condition to the governing requirement and leaves a record of why the decision was made.
applicable criteria. The other choices rely on assumption, remove safeguards, or change
conditions before the cause is understood.
11. Required lifesaving equipment is not ready before departure. Which sequence
is most appropriate when carrying out environmental protection?
2. A pollution-prevention control is compromised during operations. Which A. Continue the transfer until the planned quantity is complete.
evidence is most important when evaluating Fire prevention? B. Depart with required safety equipment unavailable because conditions are calm.
A. Depart with required safety equipment inoperative because the voyage is short. C. Wash a small spill overboard rather than initiating the response process.
B. Review required safety equipment and readiness before departure and compare the D. Stop or control the operation, protect personnel and follow the required emergency
findings with the applicable criteria. or pollution-response procedure, then verify the resulting state before moving to the
C. Discharge a small contaminant amount rather than initiating the response procedure. next step.
D. Make an unverified ballast change solely to improve trim. Correct Answer: D
Correct Answer: B Explanation: The correct choice follows a verify-act-confirm sequence. That is more
Explanation: This is the most appropriate option because it connects the observed reliable than bypassing controls or making multiple uncontrolled changes.
condition to the governing requirement and leaves a record of why the decision was made.
12. The vessel approaches a traffic or pilotage constraint; a target bearing
3. A machinery temperature rises above its normal operating trend. Which response remains nearly constant as range decreases. Which choice demonstrates the
best controls the primary risk associated with damage control? strongest control of STCW competence, drills, records and professional
A. Reset a protective trip repeatedly without finding the cause. watchkeeping standards?
B. Protect the plant, verify the indication and diagnose the affected system before A. Make a series of small course changes that are difficult to detect.
resetting or increasing load. B. Rely on one electronic source when independent information conflicts.
C. Disable an alarm that is interrupting operations. C. Cross-check position, traffic and navigation sources before altering the passage
D. Make several plant changes simultaneously before recording the original condition. plan.
Correct Answer: B D. Assume there is no risk because the other vessel is visually small.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: C
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for STCW
4. An alarm occurs during machinery operation; a target bearing remains nearly
competence, drills, records and professional watchkeeping standards.
constant as range decreases. Before proceeding with work involving abandonment
procedures, what should be verified? 13. A stability calculation is required after cargo or ballast changes. What is
A. Review stability data, loading condition and free-surface effects and compare the required before accepting the result related to STCW competence?
findings with the applicable criteria. A. Review weather, tide/current, under-keel clearance and route hazards and compare
B. Make an unverified ballast change solely to improve trim. the findings with the applicable criteria.
C. Depart with required safety equipment inoperative because the voyage is short. B. Use a single navigation source after another source shows a material discrepancy.
D. Discharge a small contaminant amount rather than initiating the response procedure. C. Assume constant bearing is harmless when range is decreasing.
Correct Answer: A D. Silence a machinery alarm and continue at the same load without investigation.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: A
checks the relevant condition, and then acts within the defined requirements for Explanation: The correct response protects the integrity of the process: establish the
abandonment procedures. facts, apply the appropriate control, and verify the result before closure.
5. An alarm appears after a change in plant configuration. Which troubleshooting 14. A position fix disagrees with the expected track. Under these conditions,
approach is most appropriate for Marine engineering or electrical systems when should the issue involving professional watchkeeping standards be escalated?
applicable to the named officer/module? A. Rely on one electronic source when independent information conflicts.
A. Disable an alarm that is interrupting operations. B. Make a series of small course changes that are difficult to detect.
B. Reset a protective trip repeatedly without finding the cause. C. Cross-check position, traffic and navigation sources before altering the passage
C. Increase machinery load to see whether the abnormal indication clears. plan.
D. Protect the plant, verify the indication and diagnose the affected system before D. Continue on an uncertain position until the next scheduled fix.
resetting or increasing load. Correct Answer: C
Correct Answer: D Explanation: This approach preserves control of the situation while producing evidence
Explanation: The correct response protects the integrity of the process: establish the that can confirm whether the action actually corrected the issue involving professional
facts, apply the appropriate control, and verify the result before closure. watchkeeping standards.
6. An electrical protective device trips repeatedly. Which action best supports a 15. A stability calculation is required after cargo or ballast changes. Which
defensible decision about Marine engineering? comparison is most useful for interpreting Communications, GMDSS awareness and
A. Make several plant changes simultaneously before recording the original condition. distress/urgency procedures?
B. Increase machinery load to see whether the abnormal indication clears. A. Silence a machinery alarm and continue at the same load without investigation.
C. Compare operating pressures/temperatures, equipment status and recent changes to B. Review machinery pressures, temperatures, alarms and operating limits and compare
isolate the fault safely. the findings with the applicable criteria.
D. Disable an alarm that is interrupting operations. C. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C D. Assume constant bearing is harmless when range is decreasing.
Explanation: This approach preserves control of the situation while producing evidence Correct Answer: B
that can confirm whether the action actually corrected the issue involving Marine Explanation: This answer uses verified evidence before action, which reduces the chance
engineering. of masking the real problem and supports a traceable decision about Communications,
GMDSS awareness and distress/urgency procedures.
7. A vessel must plan a passage through constrained waters. A change affecting
electrical systems applicable to the named officer/module is being considered. 16. An alarm occurs during machinery operation; a target bearing remains nearly
How should it be handled? constant as range decreases. Which action best distinguishes the underlying cause
A. Use a single navigation source after another source shows a material discrepancy. from a symptom in GMDSS awareness?
B. Assume constant bearing is harmless when range is decreasing. A. Verify the loading and stability data before accepting a cargo or ballast change,
C. Respond to an abnormal machinery indication by protecting the plant, confirming the then confirm that the corrective action is effective before closure.
indication and following the operating procedure. B. Make an unverified ballast change solely to improve trim.
D. Silence a machinery alarm and continue at the same load without investigation. C. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: C D. Discharge a small contaminant amount rather than initiating the response procedure.
Explanation: This answer uses verified evidence before action, which reduces the chance Correct Answer: A
of masking the real problem and supports a traceable decision about electrical systems Explanation: The selected action best supports safe, compliant, and technically sound
applicable to the named officer/module. performance because it addresses GMDSS awareness using observable evidence rather than
convenience.
8. Required lifesaving equipment is not ready before departure; a machinery
temperature rises 20 C above its normal trend. The abnormal condition directly 17. An engineering watch observes an abnormal temperature or pressure. Which
affects Pollution prevention, MARPOL principles and environmental protection. response is most consistent with the professional or compliance requirements
What is the most appropriate response? governing distress/urgency procedures?
A. Enter an enclosed space based only on a prior atmosphere test. A. Assume constant bearing is harmless when range is decreasing.
B. Wash a small spill overboard rather than initiating the response process. B. Respond to an abnormal machinery indication by protecting the plant, confirming the
C. Correct a required safety-equipment deficiency and verify readiness before indication and following the operating procedure.
proceeding. C. Silence a machinery alarm and continue at the same load without investigation.
D. Continue the transfer until the planned quantity is complete. D. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C Correct Answer: B
Explanation: The selected action best supports safe, compliant, and technically sound Explanation: A defensible professional decision should be based on current evidence and
performance because it addresses Pollution prevention, MARPOL principles and applicable criteria. The other choices rely on assumption, remove safeguards, or change
environmental protection using observable evidence rather than convenience. conditions before the cause is understood.
9. An enclosed-space task is proposed without a completed entry check. Which 18. The vessel approaches a traffic or pilotage constraint. Which handoff
documentation approach best supports traceability for Pollution prevention? practice best reduces error risk for Collision avoidance, maneuvering, pilotage
A. Record the observed condition, supporting evidence, decision and responsible and restricted-water operations?
follow-up; communicate any unresolved risk to the next responsible person. A. Rely on one electronic source when independent information conflicts.
B. Depart with required safety equipment unavailable because conditions are calm. B. Make a series of small course changes that are difficult to detect.
C. Continue the transfer until the planned quantity is complete. C. Continue on an uncertain position until the next scheduled fix.
D. Enter an enclosed space based only on a prior atmosphere test. D. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: A follow-up; communicate any unresolved risk to the next responsible person.
Explanation: A defensible professional decision should be based on current evidence and Correct Answer: D
applicable criteria. The other choices rely on assumption, remove safeguards, or change Explanation: This is the most appropriate option because it connects the observed
conditions before the cause is understood. condition to the governing requirement and leaves a record of why the decision was made.
1
,USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
19. A position fix disagrees with the expected track. Which decision about 28. The vessel approaches a traffic or pilotage constraint; a machinery
Collision avoidance is best supported by the available evidence? temperature rises 20 C above its normal trend. The abnormal condition directly
A. Assume there is no risk because the other vessel is visually small. affects Meteorology, tides, currents and environmental conditions affecting safe
B. Continue on an uncertain position until the next scheduled fix. navigation. What is the most appropriate response?
C. Rely on one electronic source when independent information conflicts. A. Make a series of small course changes that are difficult to detect.
D. Use all available means to determine collision risk and take early, substantial B. Rely on one electronic source when independent information conflicts.
action consistent with the applicable navigation rules. C. Cross-check position, traffic and navigation sources before altering the passage
Correct Answer: D plan.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more D. Assume there is no risk because the other vessel is visually small.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: C
Explanation: The strongest exam-style response is the one that controls immediate risk,
20. A pre-departure check identifies a safety-equipment deficiency; a navigation
checks the relevant condition, and then acts within the defined requirements for
fix differs by 0.8 nautical mile from another source. Which review step adds the Meteorology, tides, currents and environmental conditions affecting safe navigation.
most value before closing work involving restricted-water operations?
A. Depart with required safety equipment inoperative because the voyage is short. 29. Another vessel remains on nearly constant bearing while range decreases.
B. Discharge a small contaminant amount rather than initiating the response procedure. Which documentation approach best supports traceability for environmental
C. Make an unverified ballast change solely to improve trim. conditions affecting safe navigation?
D. Verify the loading and stability data before accepting a cargo or ballast change, A. Continue on an uncertain position until the next scheduled fix.
then confirm that the corrective action is effective before closure. B. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: D follow-up; communicate any unresolved risk to the next responsible person.
Explanation: The strongest exam-style response is the one that controls immediate risk, C. Assume there is no risk because the other vessel is visually small.
checks the relevant condition, and then acts within the defined requirements for D. Make a series of small course changes that are difficult to detect.
restricted-water operations. Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the
21. Another vessel remains on nearly constant bearing while range decreases. With
facts, apply the appropriate control, and verify the result before closure.
respect to Navigation rules, watchkeeping responsibilities and bridge resource
management, what is the best FIRST action? 30. Ballast is proposed to correct a list. Which action is most likely to prevent
A. Use all available means to determine collision risk and take early, substantial recurrence of a problem involving Ship stability, trim, loading and basic
action consistent with the applicable navigation rules. stability calculations?
B. Continue on an uncertain position until the next scheduled fix. A. Accept a loading condition based only on even draft readings.
C. Assume there is no risk because the other vessel is visually small. B. Ignore slack-tank effects because total liquid weight is unchanged.
D. Make a series of small course changes that are difficult to detect. C. Account for free-surface and weight-shift effects when evaluating stability and
Correct Answer: A trim, then confirm that the corrective action is effective before closure.
Explanation: The correct response protects the integrity of the process: establish the D. Move heavy cargo higher to free lower deck space without recalculation.
facts, apply the appropriate control, and verify the result before closure. Correct Answer: C
Explanation: This approach preserves control of the situation while producing evidence
22. A position fix disagrees with the expected track. Which evidence is most
that can confirm whether the action actually corrected the issue involving Ship
important when evaluating Navigation rules? stability, trim, loading and basic stability calculations.
A. Review position sources, charted hazards, depth/under-keel clearance and traffic
and compare the findings with the applicable criteria. 31. A slack tank creates additional free-surface effect. Which sequence is most
B. Rely on one electronic source when independent information conflicts. appropriate when carrying out Ship stability?
C. Make a series of small course changes that are difficult to detect. A. Correct a list by moving weight without checking stability impact.
D. Continue on an uncertain position until the next scheduled fix. B. Recalculate the relevant stability condition before accepting the loading or
Correct Answer: A ballast change, then verify the resulting state before moving to the next step.
Explanation: This approach preserves control of the situation while producing evidence C. Move heavy cargo higher to free lower deck space without recalculation.
that can confirm whether the action actually corrected the issue involving Navigation D. Accept a loading condition based only on even draft readings.
rules. Correct Answer: B
Explanation: This answer uses verified evidence before action, which reduces the chance
23. A position fix disagrees with the expected track. Which response best
of masking the real problem and supports a traceable decision about Ship stability.
controls the primary risk associated with watchkeeping responsibilities?
A. Assume there is no risk because the other vessel is visually small. 32. Ballast is proposed to correct a list; visibility falls below one nautical
B. Continue on an uncertain position until the next scheduled fix. mile. Which choice demonstrates the strongest control of basic stability
C. Use all available means to determine collision risk and take early, substantial calculations?
action consistent with the applicable navigation rules. A. Account for free-surface and weight-shift effects when evaluating stability and
D. Rely on one electronic source when independent information conflicts. trim.
Correct Answer: C B. Ignore slack-tank effects because total liquid weight is unchanged.
Explanation: This answer uses verified evidence before action, which reduces the chance C. Accept a loading condition based only on even draft readings.
of masking the real problem and supports a traceable decision about watchkeeping D. Correct a list by moving weight without checking stability impact.
responsibilities. Correct Answer: A
24. A deck watch detects a change in bearing to another vessel; a target bearing Explanation: The selected action best supports safe, compliant, and technically sound
performance because it addresses basic stability calculations using observable evidence
remains nearly constant as range decreases. Before proceeding with work involving
rather than convenience.
bridge resource management, what should be verified?
A. Review pollution-prevention requirements and the condition of containment systems 33. An electrical protective device trips repeatedly. What is required before
and compare the findings with the applicable criteria. accepting the result related to Fire prevention, firefighting, damage control and
B. Discharge a small contaminant amount rather than initiating the response procedure. abandonment procedures?
C. Make an unverified ballast change solely to improve trim. A. Disable an alarm that is interrupting operations.
D. Depart with required safety equipment inoperative because the voyage is short. B. Reset a protective trip repeatedly without finding the cause.
Correct Answer: A C. Increase machinery load to see whether the abnormal indication clears.
Explanation: The selected action best supports safe, compliant, and technically sound D. Review pressure, temperature, lubrication, electrical load, alarm history and
performance because it addresses bridge resource management using observable evidence equipment status and compare the findings with the applicable criteria.
rather than convenience. Correct Answer: D
25. A towing or deck operation is affected by changing weather. Which Explanation: A defensible professional decision should be based on current evidence and
applicable criteria. The other choices rely on assumption, remove safeguards, or change
troubleshooting approach is most appropriate for Chartwork, publications, voyage
conditions before the cause is understood.
planning and position fixing?
A. Respond to an abnormal machinery indication by protecting the plant, confirming the 34. A deck watch detects a change in bearing to another vessel. Under these
indication and following the operating procedure. conditions, when should the issue involving Fire prevention be escalated?
B. Use a single navigation source after another source shows a material discrepancy. A. Contain and report a pollution risk using the required onboard response and
C. Assume constant bearing is harmless when range is decreasing. documentation process.
D. Silence a machinery alarm and continue at the same load without investigation. B. Make an unverified ballast change solely to improve trim.
Correct Answer: A C. Depart with required safety equipment inoperative because the voyage is short.
Explanation: A defensible professional decision should be based on current evidence and D. Discharge a small contaminant amount rather than initiating the response procedure.
applicable criteria. The other choices rely on assumption, remove safeguards, or change Correct Answer: A
conditions before the cause is understood. Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made.
26. A deck watch detects a change in bearing to another vessel. Which action best
supports a defensible decision about voyage planning? 35. A machinery temperature rises above its normal operating trend. Which
A. Depart with required safety equipment inoperative because the voyage is short. comparison is most useful for interpreting damage control?
B. Discharge a small contaminant amount rather than initiating the response procedure. A. Reset a protective trip repeatedly without finding the cause.
C. Contain and report a pollution risk using the required onboard response and B. Disable an alarm that is interrupting operations.
documentation process. C. Make several plant changes simultaneously before recording the original condition.
D. Make an unverified ballast change solely to improve trim. D. Review pressure, temperature, lubrication, electrical load, alarm history and
Correct Answer: C equipment status and compare the findings with the applicable criteria.
Explanation: This is the most appropriate option because it connects the observed Correct Answer: D
condition to the governing requirement and leaves a record of why the decision was made. Explanation: The correct choice follows a verify-act-confirm sequence. That is more
reliable than bypassing controls or making multiple uncontrolled changes.
27. An alarm occurs during machinery operation. A change affecting position
fixing is being considered. How should it be handled? 36. A navigation fix does not agree with another available source; the vessel
A. Respond to an abnormal machinery indication by protecting the plant, confirming the draft increases after cargo loading. Which action best distinguishes the
indication and following the operating procedure. underlying cause from a symptom in abandonment procedures?
B. Silence a machinery alarm and continue at the same load without investigation. A. Discharge a small contaminant amount rather than initiating the response procedure.
C. Use a single navigation source after another source shows a material discrepancy. B. Verify the loading and stability data before accepting a cargo or ballast change,
D. Assume constant bearing is harmless when range is decreasing. then confirm that the corrective action is effective before closure.
Correct Answer: A C. Make an unverified ballast change solely to improve trim.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more D. Depart with required safety equipment inoperative because the voyage is short.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: B
Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
abandonment procedures.
2
, USCG Second Mate / Third Mate Unlimited Tonnage Exam | Practice Exam Q&A
37. An alarm appears after a change in plant configuration. Which response is 46. A position fix disagrees with the expected track. Which action best supports
most consistent with the professional or compliance requirements governing Marine a defensible decision about professional watchkeeping standards?
engineering or electrical systems applicable to the named officer/module? A. Cross-check position, traffic and navigation sources before altering the passage
A. Disable an alarm that is interrupting operations. plan.
B. Protect the plant, verify the indication and diagnose the affected system before B. Rely on one electronic source when independent information conflicts.
resetting or increasing load. C. Make a series of small course changes that are difficult to detect.
C. Reset a protective trip repeatedly without finding the cause. D. Continue on an uncertain position until the next scheduled fix.
D. Increase machinery load to see whether the abnormal indication clears. Correct Answer: A
Correct Answer: B Explanation: This approach preserves control of the situation while producing evidence
Explanation: The correct response protects the integrity of the process: establish the that can confirm whether the action actually corrected the issue involving professional
facts, apply the appropriate control, and verify the result before closure. watchkeeping standards.
38. An electrical protective device trips repeatedly. Which handoff practice best 47. A pre-departure check identifies a safety-equipment deficiency. A change
reduces error risk for Marine engineering? affecting Communications, GMDSS awareness and distress/urgency procedures is
A. Make several plant changes simultaneously before recording the original condition. being considered. How should it be handled?
B. Increase machinery load to see whether the abnormal indication clears. A. Assume constant bearing is harmless when range is decreasing.
C. Record the observed condition, supporting evidence, decision and responsible B. Silence a machinery alarm and continue at the same load without investigation.
follow-up; communicate any unresolved risk to the next responsible person. C. Respond to an abnormal machinery indication by protecting the plant, confirming the
D. Disable an alarm that is interrupting operations. indication and following the operating procedure.
Correct Answer: C D. Use a single navigation source after another source shows a material discrepancy.
Explanation: This approach preserves control of the situation while producing evidence Correct Answer: C
that can confirm whether the action actually corrected the issue involving Marine Explanation: This answer uses verified evidence before action, which reduces the chance
engineering. of masking the real problem and supports a traceable decision about Communications,
GMDSS awareness and distress/urgency procedures.
39. A towing or deck operation is affected by changing weather. Which decision
about electrical systems applicable to the named officer/module is best supported 48. A navigation fix does not agree with another available source; the vessel
by the available evidence? draft increases after cargo loading. The abnormal condition directly affects
A. Silence a machinery alarm and continue at the same load without investigation. GMDSS awareness. What is the most appropriate response?
B. Use a single navigation source after another source shows a material discrepancy. A. Discharge a small contaminant amount rather than initiating the response procedure.
C. Assume constant bearing is harmless when range is decreasing. B. Contain and report a pollution risk using the required onboard response and
D. Respond to an abnormal machinery indication by protecting the plant, confirming the documentation process.
indication and following the operating procedure. C. Make an unverified ballast change solely to improve trim.
Correct Answer: D D. Depart with required safety equipment inoperative because the voyage is short.
Explanation: This answer uses verified evidence before action, which reduces the chance Correct Answer: B
of masking the real problem and supports a traceable decision about electrical systems Explanation: The selected action best supports safe, compliant, and technically sound
applicable to the named officer/module. performance because it addresses GMDSS awareness using observable evidence rather than
convenience.
40. Required lifesaving equipment is not ready before departure; a navigation fix
differs by 0.8 nautical mile from another source. Which review step adds the most 49. A vessel must plan a passage through constrained waters. Which documentation
value before closing work involving Pollution prevention, MARPOL principles and approach best supports traceability for distress/urgency procedures?
environmental protection? A. Use a single navigation source after another source shows a material discrepancy.
A. Enter an enclosed space based only on a prior atmosphere test. B. Record the observed condition, supporting evidence, decision and responsible
B. Wash a small spill overboard rather than initiating the response process. follow-up; communicate any unresolved risk to the next responsible person.
C. Correct a required safety-equipment deficiency and verify readiness before C. Assume constant bearing is harmless when range is decreasing.
proceeding, then confirm that the corrective action is effective before closure. D. Silence a machinery alarm and continue at the same load without investigation.
D. Continue the transfer until the planned quantity is complete. Correct Answer: B
Correct Answer: C Explanation: A defensible professional decision should be based on current evidence and
Explanation: The selected action best supports safe, compliant, and technically sound applicable criteria. The other choices rely on assumption, remove safeguards, or change
performance because it addresses Pollution prevention, MARPOL principles and conditions before the cause is understood.
environmental protection using observable evidence rather than convenience.
50. The vessel approaches a traffic or pilotage constraint. Which action is most
41. An enclosed-space task is proposed without a completed entry check. With likely to prevent recurrence of a problem involving Collision avoidance,
respect to Pollution prevention, what is the best FIRST action? maneuvering, pilotage and restricted-water operations?
A. Stop or control the operation, protect personnel and follow the required emergency A. Cross-check position, traffic and navigation sources before altering the passage
or pollution-response procedure. plan, then confirm that the corrective action is effective before closure.
B. Depart with required safety equipment unavailable because conditions are calm. B. Rely on one electronic source when independent information conflicts.
C. Continue the transfer until the planned quantity is complete. C. Make a series of small course changes that are difficult to detect.
D. Enter an enclosed space based only on a prior atmosphere test. D. Continue on an uncertain position until the next scheduled fix.
Correct Answer: A Correct Answer: A
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
51. A position fix disagrees with the expected track. Which sequence is most
42. A deck watch detects a change in bearing to another vessel. Which evidence is appropriate when carrying out Collision avoidance?
most important when evaluating MARPOL principles? A. Assume there is no risk because the other vessel is visually small.
A. Review pollution-prevention requirements and the condition of containment systems B. Continue on an uncertain position until the next scheduled fix.
and compare the findings with the applicable criteria. C. Rely on one electronic source when independent information conflicts.
B. Discharge a small contaminant amount rather than initiating the response procedure. D. Use all available means to determine collision risk and take early, substantial
C. Make an unverified ballast change solely to improve trim. action consistent with the applicable navigation rules, then verify the resulting
D. Depart with required safety equipment inoperative because the voyage is short. state before moving to the next step.
Correct Answer: A Correct Answer: D
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
43. Required lifesaving equipment is not ready before departure. Which response 52. An alarm occurs during machinery operation; a target bearing remains nearly
best controls the primary risk associated with environmental protection? constant as range decreases. Which choice demonstrates the strongest control of
A. Continue the transfer until the planned quantity is complete. restricted-water operations?
B. Depart with required safety equipment unavailable because conditions are calm. A. Make an unverified ballast change solely to improve trim.
C. Stop or control the operation, protect personnel and follow the required emergency B. Contain and report a pollution risk using the required onboard response and
or pollution-response procedure. documentation process.
D. Wash a small spill overboard rather than initiating the response process. C. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: C D. Discharge a small contaminant amount rather than initiating the response procedure.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: B
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
44. The vessel approaches a traffic or pilotage constraint; the vessel draft restricted-water operations.
increases after cargo loading. Before proceeding with work involving STCW
competence, drills, records and professional watchkeeping standards, what should 53. Another vessel remains on nearly constant bearing while range decreases. What
be verified? is required before accepting the result related to Navigation rules, watchkeeping
A. Review position sources, charted hazards, depth/under-keel clearance and traffic responsibilities and bridge resource management?
and compare the findings with the applicable criteria. A. Review bearing/range trend, own-ship course/speed, target aspect and applicable
B. Make a series of small course changes that are difficult to detect. rule and compare the findings with the applicable criteria.
C. Rely on one electronic source when independent information conflicts. B. Continue on an uncertain position until the next scheduled fix.
D. Assume there is no risk because the other vessel is visually small. C. Assume there is no risk because the other vessel is visually small.
Correct Answer: A D. Make a series of small course changes that are difficult to detect.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: A
checks the relevant condition, and then acts within the defined requirements for STCW Explanation: The correct response protects the integrity of the process: establish the
competence, drills, records and professional watchkeeping standards. facts, apply the appropriate control, and verify the result before closure.
45. A pre-departure check identifies a safety-equipment deficiency. Which 54. A position fix disagrees with the expected track. Under these conditions,
troubleshooting approach is most appropriate for STCW competence? when should the issue involving Navigation rules be escalated?
A. Silence a machinery alarm and continue at the same load without investigation. A. Rely on one electronic source when independent information conflicts.
B. Respond to an abnormal machinery indication by protecting the plant, confirming the B. Cross-check position, traffic and navigation sources before altering the passage
indication and following the operating procedure. plan.
C. Use a single navigation source after another source shows a material discrepancy. C. Make a series of small course changes that are difficult to detect.
D. Assume constant bearing is harmless when range is decreasing. D. Continue on an uncertain position until the next scheduled fix.
Correct Answer: B Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving Navigation
rules.
3
