單項(xiàng)選擇題

Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.

A.has been sent in for repair
B.cannot be supported against a vertical flat surface
C.does not extend to the water when the ship lists 15 degrees
D.is not equipped with vertical guard rails on either side

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單項(xiàng)選擇題

Any person maintaining a listening watch on a bridge-to-bridge radiotelephone must be able to（）.

A.speak English
B.repair the unit
C.send Morse Code
D.speak a language the vessel's crew will understand

單項(xiàng)選擇題

Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.

A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code