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

The function of the waveguide is to ….

A conduct pulses to and from the scanner.

B generate the RF pulses.

C shape the beam in vertical plane.

D block the transmitter during reception.

Question 3

Weaker echoes are converted to signals of detectable strength by the ….

A local oscillator.

B Intermediate Frequency amplifier.

C limiter circuit.

D mixer crystals.

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

When choosing objects for position fixing by radar ranges you should, if possible, avoid ...

A sloping land features.

B large prominent features.

C small isolated features.

D steep faced features.

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