A.from the ship's propeller when making up aft
B.from being overrun if making up forward
C.hull damage while alongside passing a hawser
D.getting in a tripping position
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A.at any time while underway
B.while at anchor
C.while alongside a vessel
D.All of the above
A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown
A.underway，but not making way
B.aground
C.being towed
D.not engaged in pilotage duty
A.should never use radar bearings
B.should only use radar bearings when the range exceeds the distance to the horizon
C.can use radar information from one object to fix the position
D.must use information from targets forward of the beam
A.straight line
B.arc
C.parabola
D.line parallel to the coast
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The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
The period at high or low tide during which there is no change in the height of the water is called the （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
An occulting light is one in which （）.
A pilot vessel on pilotage duty shall show identity lights （）.
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
The distance between the surface of the water and the tidal datum is the （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
Lateral movement of the vessel to leeward of its course defines （）.
Conditions for crossing a rough bar are usually best at （）.