单项选择题

（）is not a type of IALA maritime buoyage system.

A.special marks
B.isolated danger marks
C.cardinal marks
D.fore and aft marks

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单项选择题

When using the anchor to steady the bow while approaching a dock you must be aware of the fact that（）.

A.the vessel will tend to take a large sheer towards the side where the anchor is down
B.steering control is ineffective in trying to turn to the side opposite to that of the anchor being used
C.the anchor cable must never lead under the hull
D.using an offshore anchor decreases the chances of the anchor holding

单项选择题

When underway and proceeding ahead，as the speed increases，the pivot point tends to（）.

A.move aft
B.move forward
C.move lower
D.remain stationary

单项选择题

When towing in an open seaway，it is important to use a towing line（）.

A.made only of wire rope，due to possible weather conditions
B.that will have the tow on a crest while your vessel is in a trough
C.that will have the tow on a crest while your vessel is on a crest
D.with little dip to gain maximum control of the tow