单项选择题

A.unwatchedB.surrounded by riprapC.a minor lightD.const……

The irregular black line around a charted light such as Race Rock Light indicates that it is （）.

A.unwatched
B.surrounded by riprap
C.a minor light
D.constructed on an artificial island

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单项选择题The horizontal flat surfaces where the upper stock joins the rudder are the（）.

A.rudder keys
B.rudder palms
C.lifting flanges
D.shoes of the rudder

单项选择题The grip of a joint represents the（）.

A.thickness of the connected members
B.diameter of the head
C.entire length of the rivet
D.diameter of the shank

单项选择题The fluke angle of an anchor system is the angle between the（）.

A.flukes and the shank
B.shank and the sea bottom
C.mooring line and the sea bottom
D.flukes and the shackle

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A.swivel
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C.spider band
D.gooseneck

单项选择题The crude oil washing installation and associated equipment and arrangements shall（）with the requirements established by the Administration.

A.comply
B.supply
C.provide
D.deny