A.close
B.open
C.switch off
D.switch on
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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
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
A.temperature of the air equals the temperature of the seawater
B.atmospheric pressure is 14.7 lbs. per square inch
C.relative humidity reaches 50%
D.air becomes saturated with water vapor
A.American Society of Mechanical Engineers
B.American Petroleum Institute
C.Society of Petroleum Engineers
D.American Society of Civil Engineers
A.above
B.over
C.up
D.upon
A.mean low water
B.the same as that used for the charts of the locality
C.the highest possible level
D.given in table three of the tide tables
最新试题
While proceeding to a distress site，you hear the words “Seelonce mayday” on the radiotelephone.Which action should you take（）.
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 external flotation bladder of an immersion suit should be inflated（）.
（） may not justify detention.
The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.
Where advance freight is agreed upon，payment does not depend on delivery and must be made （）the ship is lost and the cargo never delivered.
The direction in which a vessel is steered is the course. The path actually followed is the （）.
The datum from which the predicted heights of tides are reckoned in the tide tables is（）.
The dangerous semicircle of a typhoon in the Southern Hemisphere is that area（）.
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?（）