题目内容

Which of the following is true of NBDP ARQ mode?

A. This is an interactive mode.
B. Each character is repeated three times.
C. Each character is transmitted twice.
D. This mode is generally used to broadcast messages.

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In radiotelephony. how many times shall the safety signal SECURITE be repeated on the announcement of a safety message?

A. Three times.
B. Three times at most.
C. Twice.
D. Six times.

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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.

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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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Which of the following is true of NBDP ARQ mode?

A. This is an interactive mode. B. Each character is repeated three times. C. Each character is transmitted twice. D. This mode is generally used to broadcast messages.

In radiotelephony. how many times shall the safety signal SECURITE be repeated on the announcement of a safety message?

What is an " area call " usually applied to?

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.

A. This is an interactive mode.
B. Each character is repeated three times.
C. Each character is transmitted twice.
D. This mode is generally used to broadcast messages.