题目内容

What is an " area call " usually applied to?

Alert all ships in a limited sea area.
B. Send the alert to all ships.
C. Send the alert to the ships in the vicinity of a distress incident.
D. Send the alert to several ships.

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How many digits are there in ship station ' s own unique MMSI which is automatically included in a DSC call?

A. 4 digits.
B. 5 digits.
C. 7 digits.
D. 9 digits.

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_______by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signal.

A. Which is assisted
B. That assists you
C. When you assisted
D. When being assisted

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In order to avoid all ships in a large sea area being alerted, which message format shall be selected by an operator?

Area call.
B. Distress call.
C. Urgency call.
DSC call.

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The ARQ mode should be applied___________.

A. when two stations communicate with each other
B. in any radio system at any time
C. when one ship sends messages to another
D. for communication Among some stations

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What is an " area call " usually applied to?

Alert all ships in a limited sea area. B. Send the alert to all ships. C. Send the alert to the ships in the vicinity of a distress incident. D. Send the alert to several ships.

How many digits are there in ship station ' s own unique MMSI which is automatically included in a DSC call?

_______by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signal.

In order to avoid all ships in a large sea area being alerted, which message format shall be selected by an operator?

The ARQ mode should be applied___________.

Alert all ships in a limited sea area.
B. Send the alert to all ships.
C. Send the alert to the ships in the vicinity of a distress incident.
D. Send the alert to several ships.