单项选择题

What generally occurs when the land is cooler than the nearby water? （）

A.A land breeze
B.A sea breeze
C.A norther
D.A prevailing westerly

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单项选择题

Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy（）.

A.should be left to port when heading out to sea
B.may be left close aboard on either side
C.is on the north side of a point of interest
D.is marking the preferred channel

单项选择题

Under normal weather and sea conditions when securing a stack of containers with twist locks，lashings are required when the tier exceeds what height? （）

A.Lashings are always required
B.One container
C.Two containers
D.Three containers