A.the height of the tide
B.depth of water under the bridge
C.charted vertical clearance at mean low water
D.distance from the water to low steel of the bridge
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A.concealed
B.buried
C.existed
D.built
A.one nautical mile
B.two kilometers
C.5 cables only
D.one fathom
A.a vessel arrives at a port in a evening
B.a vessel leaves a port in a evening
C.a vessel arrives at a port in a morning
D.a vessel leaves a port in a morning
A.by
B.with
C.on
D.in
A.cable areas
B.dumping grounds
C.fish trap areas
D.precautionary areas
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On a voyage from Halifax,N.S.,to Dakar,West Africa,the Canary Current will （）.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
Conditions for crossing a rough bar are usually best at （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
A vessel is entering port A for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do（）.
The height of tide 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 （）.