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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Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
The height of eye correction is smaller than geometrical dip because of （）.
Lateral movement of the vessel to leeward of its course defines （）.
Conditions for crossing a rough bar are usually best at （）.
The height of tide is the （）.
As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．