A.spring-loaded line thrower
B.hand thrown buoyant line
C.shoulder type line throwing gun
D.heaving line
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A.Concentration of weight aft
B.Concentration of weight forward
C.Concentration of weight amidships
D.Concentration of weight at both ends of the vessel
A.The running reflection
B.The turning effect
C.The moving speed
D.The changing sensibility
A.cutting a square notch at each end of the crack
B.drilling a hole at each end of the crack
C.slot-welding the crack
D.welding a doubler over the crack
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Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.
How can you estimate the position of a tropical storm’s center?（）
How do you operate a portable CO2 fire extinguisher?（）
Great Salt Pond on Block Island is（）.
Handholds or straps on the underside of an inflatable liferaft are provided（）.
Hot air can hold（）.
General information on enroute weather and climate is found in（）.
High pressure and low pressure alarms must be tested（）.
General requirements for a vessel’s radiotelephone station log are that（）.
Freeboard is measured from the upper edge of the（）.