單項選擇題You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear（）.

A.Speech
B.Signaling tones
C.A busy signal
D.All of the above


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2.單項選擇題（）both anchors.

A.Drag
B.Dredge
C.Weigh
D.Lie

3.單項選擇題The control of distress traffic is the responsibility of（）.

A.the owners
B.the charterers
C.the shipper
D.the vessel in distress or of the station that relays the distress message

4.單項選擇題What is meant by veering the anchor chain? （）

A.Bringing the anchor to short stay
B.Heaving in all the chain
C.Locking the windlass to prevent more chain from running out
D.Paying out more chain

5.單項選擇題What does the abbreviation VHF stand for?（）

A.Vessel's Hoisting Flag
B.Very High Safety
C.Vessel's Homing Frequency
D.Very High Frequency