ARPA Written Exam – OOD | Latest 2025/ 2026
Update | Questions and Answers | 100% Verified
Solutions | GRADED A
……
Question:
What controls would you adjust if known targets were not being detected on your radar?
Answer:
Gain, suppressions + range scale
Question:
What contributes to assessment of risk of collision?
Answer:
-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 + speed as your vessel
, Question:
You are underway at 10 kts. At 1800 you note a radar contact dead ahead at a range of 10 miles.
At 1812 the contact is still dead ahead bu at a range of 8 miles. The estimated speed of the
contact is .
Answer:
Dead in the Water (DIW)
Question:
You are underway at 5 kts and see on your radar a contact 10 miles directly astern of you. 12
minutes later the same contact is 8 miles directly astern of you. What is the estimated speed of
the contact?
Answer:
15 kts
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 North is always at the top
of the screen is called a/an
Answer:
Stabilized display
Update | Questions and Answers | 100% Verified
Solutions | GRADED A
……
Question:
What controls would you adjust if known targets were not being detected on your radar?
Answer:
Gain, suppressions + range scale
Question:
What contributes to assessment of risk of collision?
Answer:
-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 + speed as your vessel
, Question:
You are underway at 10 kts. At 1800 you note a radar contact dead ahead at a range of 10 miles.
At 1812 the contact is still dead ahead bu at a range of 8 miles. The estimated speed of the
contact is .
Answer:
Dead in the Water (DIW)
Question:
You are underway at 5 kts and see on your radar a contact 10 miles directly astern of you. 12
minutes later the same contact is 8 miles directly astern of you. What is the estimated speed of
the contact?
Answer:
15 kts
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 North is always at the top
of the screen is called a/an
Answer:
Stabilized display
