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單項選擇題

A double male coupling is one that（）.

A.has left hand twist
B.has inside threads on both ends
C.has outside threads on both ends
D.takes two men to operate

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單項選擇題

A fairly accurate estimation of a ship’s position can be calculated by a technique known as（）.

A.dead reckoning
B.pilotage
C.great circle sailing
D.geographic navigation

單項選擇題

A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind（）.

A.blows the fire back toward the vessel
B.comes over the bow
C.comes over the stern
D.comes over either beam