A.slip
B.sidewise force
C.rotational force
D.thrust
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A.close
B.open
C.switch off
D.switch on
A.only after two hours in the water
B.only after four hours in the water
C.before entry into the water
D.upon entry into the water
A.when approved by the lockmaster
B.when locking downbound
C.at no time
D.during high water only
A.it increases the likelihood of collision between the towing vessel and the disabled vessel
B.recreational boaters tend to make the heaving line fast to the towed vessel as if it were the towline
C.the monkey fist may injure someone
D.it may reduce the catenary and increase yawing
A.route
B.track
C.heading
D.course over the ground
最新試題
The damage to a vessel is over $25，000. Who must notify the nearest Coast Guard Marine Safety or Marine Inspection Office as soon as possible? （）
The port State control officer may ensure that（）are exhibited in conspicuous places throughout the ship.
The depth（）a shallow patch，lying about 1.3 miles southeastward of Nanshan Tou lighthouse reduces to about 6.1 meters.
（） may not justify detention.
The disadvantage of using a heaving line to pass a towline is that（）.
Which statement about radio navigational warnings is TRUE（）.
The external flotation bladder of an immersion suit should be inflated（）.
The direction in which a vessel is steered is the course. The path actually followed is the （）.
Which step should be taken，if possible，when the vessel must be abandoned because of a distress situation（）.
The force exerted by a propeller which tends to throw the stern right or left is called（）.