(D)Element 8-36 ARPA-CAS

Question 1

The ship’s speed indication on the ARPA display can be set manually, but does not change with changes in the vessel’s speed. What other indication would point to a related equipment failure?

Answer 1

“LOG OUT” is displayed on the ARPA indicator.

Question 2

What does the term ARPA/CAS refer to?

Answer 2

The device which acquires and tracks targets that are displayed on the RADAR indicator’s CRT

Question 3

Which of the following would not be considered an input to the computer of a collision avoidance system?

Answer 3

Own ship’s wind velocity from an anemometer

Question 4

Which answer best describes a line on the display which indicates a target’s position. The speed is shown by the length of the line and the course by the direction of the line.

Answer 4

Vector

Question 5

What is the purpose or function of the “Trial Mode” used in most ARPA equipment?

Answer 5

It is used to allow results of proposed maneuvers to be assessed.

Question 6

The ARPA term CPA refers to

Answer 6

The closest point a ship or target will approach your own ship.