Bridge Navigation & Deck Operations

Radar & ARPA Competence Test

This test covers the principles and practical use of marine radar and ARPA systems for safe navigation and collision avoidance. It includes questions on radar theory, equipment operation, echo interpretation, CPA/TCPA assessment, radar plotting, and compliance with COLREG. Ideal for navigational officers preparing for operational or management certification.

Questions 15

Time Limit 9 min

Language English

Sample Questions

Here are some example questions from this quiz. Download the GYRO app to take the full test.

Question 1

The preferred method of radar position fixing for greatest accuracy is ….

A taking a radar range and visual bearing.

B taking a radar range and radar bearing.

C taking several radar ranges.

D taking several radar bearings.

Question 2

An operation check required on installation is to ….

A measure the frequency of the local oscillator.

B measure the peak power output.

C determine the length of waveguide.

D determine the limits of shadow sectors.

Question 3

The horizontal distance between the adjacent crests of a radio wave is called ….

A the wavelength.

B the amplitude.

C a cycle.

D the frequency.

Question 4

In restricted visibility, risk of collision can best be assessed by ….

A listening for the target’s sound signals.

B posting additional lookouts.

C watching the target’s radar bearing and range.

D establishing radio communication with the target.

E watching the target’s radar bearing and range

Question 5

If possible the radar display should be sited ….

A so it can be viewed facing forward.

B as close as possible to the compass.

C as far forward as possible in the ship.

D so that it is on the fore-and-aft line.

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