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
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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
A.one sidelight and the masthead light are visible
B.the vessels will pass closer than half a mile
C.both vessels sound one prolonged blast
D.both sidelights and masthead light(s) are visible
A.required navigation lights
B.lifesaving equipment standards
C.casualty reporting procedures
D.currents in various locations
最新試題
The distance between the surface of the water and the tidal datum is the （）.
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
At last，the palm trees that fringe the natural harbor of Port Aloahoa come into view on the horizon lit by the setting sun.The meaning of this sentence is that （）.
As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.
The distance between any two meridians measured along a parallel of latitude （）.
The height of a light is measured from which reference plane?（）
A pilot vessel on pilotage duty shall show identity lights （）.
Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.