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
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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
A.course
B.track
C.heading
D.course over the ground
A.a difference in water pressure
B.the method of breaking up the water stream
C.the length of the applicator
D.All of the above
最新試題
The port State control officer will ensure that（）is performed by all crude carriers either required to have a crude oil washing system or where the owner or operator chooses to install a crude oil washing system.
The direction a vessel is pointed at any given time is the（）.
The port State control officer or the surveyor authorized by the port State Administration must be aware that（）may be carried on product carriers.
The dangerous semicircle of a typhoon in the Southern Hemisphere is that area（）.
The force exerted by a propeller which tends to throw the stern right or left is called（）.
The disadvantage of using a heaving line to pass a towline is that（）.
Which statement about radio navigational warnings is TRUE（）.
The depth（）a shallow patch，lying about 1.3 miles southeastward of Nanshan Tou lighthouse reduces to about 6.1 meters.
The consistent winds blowing from the horse latitudes to the doldrums are called the（）.
While proceeding to a distress site，you hear the words “Seelonce mayday” on the radiotelephone.Which action should you take（）.