ARPA Exam | Latest 2025/ 2026 Update |
Questions and Verified Answers | GRADED A
….
Question:
What controls would you adjust if known targets we're not being detected on your radar?
Answer:
- Gain, suppressions, range scale
Question:
Which of the following contributes to assessment of risk of collision?
Answer:
- The relative motion line (CPA/TCPA), aspect, the amount of error in calculations
Question:
A radar contact will remain stationary on a relative motion radar display only when it is?
Answer:
- On the same course and speed is your vessel.
Question:
You are under way at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10
miles. At 1812 the contact is still dead ahead but at a range of eight miles. The estimated speed
of the contact is?
Answer:
- Dead in the water (DIW)
,Question:
You are underway at 5 knots in C on your radar a contact Tim miles directly astern of you. 12
minutes later the same contact is at 8 miles directly astern a few. What is the estimated speed of
the contact?
Answer:
- 15 knots
Question:
The closest point of approach (CPA) of a contact on a relative motion radar may be determined:
Answer:
- after the contact has been marked at least twice over a period of at least a minute.
Question:
A radar display in which the orientation of the display is fixed so that the north is always at the
top of the screen is called a/an?
Answer:
Stabilize Display
Question:
What are the inputs to maintain a northup, true motion display?
Answer:
, - gyro course and log speed
Question:
In addition to ARPA information, an ARPA user should take into account:
Answer:
- The limitation is the information, rules of the road, the circumstances of the situation including
external considerations.
Question:
In restricted visibility what should you avoid when altering course for a vessel forward your
beam that you cannot see visually?
Answer:
- Altering course to port except in overtaking situations.
Question:
when two ARPA equipped ships collide, which of the following is typically true?
Answer:
- both vessels are likely to be found at fault.
Question:
When using an ARPA, what should you consider in order to evaluate the information displayed?
Answer:
- Navigational constraints may require a target vessel to change course.
Questions and Verified Answers | GRADED A
….
Question:
What controls would you adjust if known targets we're not being detected on your radar?
Answer:
- Gain, suppressions, range scale
Question:
Which of the following contributes to assessment of risk of collision?
Answer:
- The relative motion line (CPA/TCPA), aspect, the amount of error in calculations
Question:
A radar contact will remain stationary on a relative motion radar display only when it is?
Answer:
- On the same course and speed is your vessel.
Question:
You are under way at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10
miles. At 1812 the contact is still dead ahead but at a range of eight miles. The estimated speed
of the contact is?
Answer:
- Dead in the water (DIW)
,Question:
You are underway at 5 knots in C on your radar a contact Tim miles directly astern of you. 12
minutes later the same contact is at 8 miles directly astern a few. What is the estimated speed of
the contact?
Answer:
- 15 knots
Question:
The closest point of approach (CPA) of a contact on a relative motion radar may be determined:
Answer:
- after the contact has been marked at least twice over a period of at least a minute.
Question:
A radar display in which the orientation of the display is fixed so that the north is always at the
top of the screen is called a/an?
Answer:
Stabilize Display
Question:
What are the inputs to maintain a northup, true motion display?
Answer:
, - gyro course and log speed
Question:
In addition to ARPA information, an ARPA user should take into account:
Answer:
- The limitation is the information, rules of the road, the circumstances of the situation including
external considerations.
Question:
In restricted visibility what should you avoid when altering course for a vessel forward your
beam that you cannot see visually?
Answer:
- Altering course to port except in overtaking situations.
Question:
when two ARPA equipped ships collide, which of the following is typically true?
Answer:
- both vessels are likely to be found at fault.
Question:
When using an ARPA, what should you consider in order to evaluate the information displayed?
Answer:
- Navigational constraints may require a target vessel to change course.
