ARPA Written Exam - OOD Questions & Answers 2026 |
High-Yield Exam Prep | Graded A+
1. What is one common error associated with the ARPA system?
False target tracking
Incorrect radar range
Inaccurate speed measurement
Poor signal reception
2. What is one of the required operational warnings that ARPA systems must
provide?
Guard Rings + Zones
Automatically acquired target
CPA/TCPA - Close Quarter Warnings
Lost Target
3. What is the minimum duration for which the ARPA should track a
distinguishable target that is not subject to target swap?
The ARPA should track the target indefinitely.
The ARPA should track the target for 10 minutes.
The ARPA should continue to track the target for at least 12 minutes.
The ARPA should track the target for 5 minutes.
4. What is the term used for a radar display that maintains a fixed orientation
with North at the top?
True motion display
, Heading-up display
North-up display
Course-up display
5. What type of input is essential for providing sea stabilized information in an
ARPA system?
Wind direction
Speed over ground
Heading information
Radar contact data
6. Describe the significance of understanding ARPA limitations in navigation.
ARPA limitations are irrelevant to navigation.
ARPA limitations only affect radar display quality.
ARPA limitations are only important for training purposes.
Understanding ARPA limitations is crucial for ensuring safe
navigation and effective collision avoidance.
7. If a vessel is navigating in restricted visibility and the ARPA system indicates a
potential collision with another vessel that is not visually confirmed, what
action should the navigator take?
Use the ARPA information to make a cautious course alteration while
ensuring safety.
Ignore the ARPA data and rely solely on visual observation.
Increase speed to pass the other vessel quickly.
Maintain the current course without any adjustments.
,8. What is the primary function of the inner guard ring in an ARPA system?
To display weather conditions.
To measure the distance to the nearest land.
To provide an early warning of potential collisions.
To track the speed of nearby vessels.
9. What specific warning must ARPA systems provide according to IMO
performance standards?
A warning for low battery
A warning for radar malfunction
A warning for potential collision
A warning for weather conditions
10. Describe the significance of understanding the conditions under which a
radar contact appears stationary on a relative motion radar display.
It allows navigators to ignore all radar contacts.
It ensures that all radar contacts are displayed accurately.
Understanding these conditions helps navigators assess potential
collision risks effectively.
It simplifies the radar display for easier interpretation.
11. In restricted visibility, a vessel which detects by radar alone the presence of
another vessel shall determine if a close-quarters situation is developing or
risk of collision exists. If so, what action should she take?
All of the above
Sound the danger signal
, When taking action, make only course changes
Avoid altering course toward a vessel abaft the beam
12. In a scenario where an ARPA system fails to provide a 'Lost Target' warning,
what potential risk could arise during navigation?
Enhanced performance of other navigational aids.
Reduced need for manual radar tracking.
Improved navigation accuracy due to fewer distractions.
Increased risk of collision with an unmonitored vessel.
13. In a scenario where a vessel's ARPA system displays multiple contacts at the
same bearing due to range ambiguity, what steps should the navigator take
to ensure safe navigation?
Verify target distances using additional navigation aids and adjust
course as necessary.
Ignore the radar data and rely solely on visual observations.
Increase speed to pass through the area quickly.
Trust the ARPA system completely without further checks.
14. What is TRUE of the history of a target's past positions on an ARPA?
In the true presentation, it provides a quick visual check to
determine if a vessel has changed course
The display is one of the primary inputs and must be in use when
using the trial maneuver capability
It provides a graphic display to emphasize which vessel is on a
collision course
High-Yield Exam Prep | Graded A+
1. What is one common error associated with the ARPA system?
False target tracking
Incorrect radar range
Inaccurate speed measurement
Poor signal reception
2. What is one of the required operational warnings that ARPA systems must
provide?
Guard Rings + Zones
Automatically acquired target
CPA/TCPA - Close Quarter Warnings
Lost Target
3. What is the minimum duration for which the ARPA should track a
distinguishable target that is not subject to target swap?
The ARPA should track the target indefinitely.
The ARPA should track the target for 10 minutes.
The ARPA should continue to track the target for at least 12 minutes.
The ARPA should track the target for 5 minutes.
4. What is the term used for a radar display that maintains a fixed orientation
with North at the top?
True motion display
, Heading-up display
North-up display
Course-up display
5. What type of input is essential for providing sea stabilized information in an
ARPA system?
Wind direction
Speed over ground
Heading information
Radar contact data
6. Describe the significance of understanding ARPA limitations in navigation.
ARPA limitations are irrelevant to navigation.
ARPA limitations only affect radar display quality.
ARPA limitations are only important for training purposes.
Understanding ARPA limitations is crucial for ensuring safe
navigation and effective collision avoidance.
7. If a vessel is navigating in restricted visibility and the ARPA system indicates a
potential collision with another vessel that is not visually confirmed, what
action should the navigator take?
Use the ARPA information to make a cautious course alteration while
ensuring safety.
Ignore the ARPA data and rely solely on visual observation.
Increase speed to pass the other vessel quickly.
Maintain the current course without any adjustments.
,8. What is the primary function of the inner guard ring in an ARPA system?
To display weather conditions.
To measure the distance to the nearest land.
To provide an early warning of potential collisions.
To track the speed of nearby vessels.
9. What specific warning must ARPA systems provide according to IMO
performance standards?
A warning for low battery
A warning for radar malfunction
A warning for potential collision
A warning for weather conditions
10. Describe the significance of understanding the conditions under which a
radar contact appears stationary on a relative motion radar display.
It allows navigators to ignore all radar contacts.
It ensures that all radar contacts are displayed accurately.
Understanding these conditions helps navigators assess potential
collision risks effectively.
It simplifies the radar display for easier interpretation.
11. In restricted visibility, a vessel which detects by radar alone the presence of
another vessel shall determine if a close-quarters situation is developing or
risk of collision exists. If so, what action should she take?
All of the above
Sound the danger signal
, When taking action, make only course changes
Avoid altering course toward a vessel abaft the beam
12. In a scenario where an ARPA system fails to provide a 'Lost Target' warning,
what potential risk could arise during navigation?
Enhanced performance of other navigational aids.
Reduced need for manual radar tracking.
Improved navigation accuracy due to fewer distractions.
Increased risk of collision with an unmonitored vessel.
13. In a scenario where a vessel's ARPA system displays multiple contacts at the
same bearing due to range ambiguity, what steps should the navigator take
to ensure safe navigation?
Verify target distances using additional navigation aids and adjust
course as necessary.
Ignore the radar data and rely solely on visual observations.
Increase speed to pass through the area quickly.
Trust the ARPA system completely without further checks.
14. What is TRUE of the history of a target's past positions on an ARPA?
In the true presentation, it provides a quick visual check to
determine if a vessel has changed course
The display is one of the primary inputs and must be in use when
using the trial maneuver capability
It provides a graphic display to emphasize which vessel is on a
collision course
