單項選擇題General requirements for a vessel’s radiotelephone station log are that（）.

A.logs must be kept in an orderly manner
B.erasures are not allowed
C.it must identify the vessel's name and official number
D.All of the above


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1.單項選擇題General information on enroute weather and climate is found in（）.

A.the Sailing Directions and the Coast Pilot
B.a weather fax
C.the Local Notice to Mariners
D.the Light List

2.單項選擇題Fusible-link fire dampers are operated by（）.

A.a break-glass and pull-cable system
B.electrical controls on the bridge
C.a mechanical arm outside the vent duct
D.the heat of a fire melting the link

3.單項選擇題From your position you observe a rotating white and green light to the north. This light is most likely（）.

A.at an airport
B.on a naval mine-countermeasures vessel
C.Block Island North Light
D.on a vessel engaged in public safety activity

4.單項選擇題From which type of cloud can a tornado or waterspout develop?（）

A.Nimbostratus
B.Altostratus
C.Cumulonimbus
D.Cirrus

5.單項選擇題Freeboard is measured from the upper edge of the（）.

A.bulwark
B.deck line
C.gunwale bar
D.sheer strake