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單項選擇題

The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.

A.navigational / typhoon
B.traffic / meteorological
C.marine / hurricane
D.navigational / meteorological

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單項選擇題

Distress alerts will be relayed on the（）when the RCC considers it necessary.

A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16

單項選擇題

The WWNWS is a coordinated global service for the broadcast by radio of vital information on（）to marine navigation.

A.ship’s movement
B.safety
C.ship’s management
D.hazards