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 name and hailing port of a documented commercial vessel is（）.
Which channel and mode should be used when initiating a distress alert transmission（）.
The force exerted by a propeller which tends to throw the stern right or left is called（）.
The fog is lifted，so（）the radar．
While proceeding to a distress site，you hear the words “Seelonce mayday” on the radiotelephone.Which action should you take（）.
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 port State control officer may ensure that（）are exhibited in conspicuous places throughout the ship.
The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.
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 dangerous semicircle of a typhoon in the Southern Hemisphere is that area（）.