A.straight line
B.arc
C.parabola
D.line parallel to the coast
您可能感興趣的試卷
你可能感興趣的試題
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
A.Tidal Current Tables
B.Tide Tables
C.American Practical Navigator
D.Sailing Directions
A.Admiralty Sailing Directions
B.Admiralty List of Lights
C.Admiralty List of Signals
D.Admiralty Notices to Mariners
A.corrections
B.publications
C.supplements
D.alterations
最新試題
The height of a light is measured from which reference plane?（）
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
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.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.
Above-normal tides near the center of a hurricane maybe caused by the （）.
Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
The height of tide is the （）.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.
The Earth’s irregular heating is caused by （）.