單項選擇題

The use of the danger signal（）.

A.replaces directional signals
B.makes the other vessel the stand-on vessel
C.indicates doubt as to another vessels actions
D.is the same as a MAYDAY signal

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單項選擇題

The two main types of load cells used in mooring tension gauges are（）.

A.distortion and compression
B.hydraulic and mechanical
C.magnetic and applied torque
D.frictionless and hydraulic

單項選擇題

The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.

A.of
B.on
C.at
D.in

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The use of the danger signal（）.

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The two main types of load cells used in mooring tension gauges are（）.

The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.