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

If the trace is not correctly centred, error may occur when …

A measuring bearings.

B measuring ranges.

C using the tuning control.

D using the gain control.

Question 2

There is a risk of collision with another vessel if …

A her bearing is steady and the range is decreasing.

B her bearing is changing and the range is increasing.

C her bearing is steady and the range is increasing.

D her bearing is changing and the range is decreasing.

Question 3

Half the vertical distance between the crest and the trough of a radio wave is called …..

A the amplitude.

B the frequency.

C the wavelength.

D a cycle.

Question 4

When using the radar for coastal position fixing the main concern is to ...

A obtain the most accurate fix.

B allow for beamwidth distortion.

C avoid radar interference.

D avoid radar shadow effect.

Question 5

Side echoes are caused by reflections from ….

A the side lobes of the radar beam.

B the side of your own vessel.

C the surface of the sea.

D the obstruction in the path of the scanner.

Take This Quiz. Download the GYRO app to take this quiz and track your progress.