A.lower low water
B.high water
C.low water
D.sea level
您可能感興趣的試卷
你可能感興趣的試題
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
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
最新試題
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
An occulting light is one in which （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
Clearance gauges at bridges indicate （）.
Conditions for crossing a rough bar are usually best at （）.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.
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 （）.
The height of eye correction is smaller than geometrical dip because of （）.
The distance between any two meridians measured along a parallel of latitude and expressed in miles is the （）.
As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.