單項選擇題

Fetch is the（）.

A.distance a wave travels between formation and decay
B.stretch of water over which a wave-forming wind blows
C.time in seconds required for two crests to pass a given point
D.measurement of a wave's steepness

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單項選擇題

Especially in adverse weather，risk of collision with an offshore supply vessel increases when the vessel is moored to what side of the unit?（）.

A.Upwind
B.Downwind
C.Crosswind
D.Downcurrent

單項選擇題

Early indications of the approach of a hurricane may be all of the following EXCEPT（）.

A.short confused swells
B.gradually increasing white clouds (mare's tails)
C.pumping barometer
D.continuous fine mist-like rain