單項(xiàng)選擇題A disk with a horizontal line through its center，equivalent to the summer load line，is called the（）.

A.deadrise mark
B.maximum allowable draft mark
C.plimsoll mark
D.tonnage mark


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1.單項(xiàng)選擇題A deep draft VLCC (100，000 DWT+) navigating in a narrow channel or canal（）.

A.draws more water than when underway in deep water
B.draws less water with an increase in speed
C.requires less power for a given speed
D.steers better under full power

2.單項(xiàng)選擇題A current moving across a lock entrance toward the river or toward the dam is called a(n)（）.

A.cutoff
B.outdraft
C.lockwash
D.springpool

3.單項(xiàng)選擇題A common occurrence when a vessel is running into shallow water is that（）.

A.the wake is less pronounced
B.the vessel is more responsive to the rudder
C.squat will cause a decrease in bottom clearance and an increase in draft
D.All of the above

5.單項(xiàng)選擇題Your vessel is damaged and is listing to port. The rolling period is short. There is sufficient freeboard so that deck edge submersion is not a problem. What corrective action should be taken FIRST in regard to the vessel’s stability?（）.

A.Press up any slack double-bottom tanks to eliminate free surface
B.Flood any empty double-bottom tanks to add weight low and down
C.Jettison topside weights to reduce KG and KB
D.Shift any off-center weights from port to starboard