A.angle that the propeller makes with a free stream of water
B.angle that the propeller makes with the surface of the water
C.number of feet per revolution the propeller is designed to advance in still water without slip
D.positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without slip
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A.a margin of safety is provided should the line part
B.the towline will wear more evenly
C.there will be less stress on the towline
D.a slight increase in speed will be realized
A.advance
B.head reach
C.pitch
D.transfer
A.advance
B.head reach
C.pitch
D.transfer
A.arm
B.pitch
C.gage
D.rivet distance
A.one engine and a steering oar
B.both engines at the same speed
C.one engine at a time
D.one engine running at reduced speed and controlling the vessel with the other
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When running before a heavy sea，moving weights aft will affect the handling of a vessel by （）.
Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）
The pitch of a propeller is a measure of the（）.
The time required to incline from bow down to stern down and return to bow down again is called（）.
The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.
To prevent damage by and to storage batteries aboardsmall passenger vessels they should be located（）.
One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by （）.
What indicates that a tropical cyclone may be within 500 to 1，000 miles of your position?（）
That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the（）.
Which statement is TRUE of a stiff vessel? （）