A.warm front at night
B.low pressure area
C.anticyclone
D.lack of frontal activity
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A.in
B.on
C.with
D.by
A.is decreased
B.decreased
C.decreases
D.are decreased
A.vertical distance from the tidal datum to the ocean bottom plus the height of the tide
B.vertical distance from the tidal datum to the ocean bottom
C.average height of water over a specified period of time
D.average height of all low waters at a place
A.capital letters
B.italics
C.boldface print
D.underlined letters
A.conspicuous
B.inconspicuous
C.a government facility or station
D.a radio transmitter
最新試題
Generally，（）are used as the track charts on the high sea，（）are used for harbors，inland waters and coastal areas．
On the approach of a warm front the barometric pressure usually（）.
The range of a light on Admiralty Charts is normally the（）.
Steam smoke will occur when（）.
Which is the correct procedure for anchoring a small to medium size vessel in deep water （）.
The fog most commonly encountered at sea is called（）.
LOW ABOUT 300 MILES SOUTHWEST OF LISBON 1004 MOVING SLWLY SOUTHEAST COMMA FILLING 1006 BY MIDNIGHT.This phrase is likely to be under the heading of（）.
The best estimate of the wind direction at sea level can be obtained from observing the direction of the（）.
RYUKYU S TO SE 6 BEC 4－5.ISOL SHWRS.SEA 3 M BEC 2 M.SWELL SE 3－4M.This description is likely to be under the heading of（）.
Information for updating nautical charts is primarily found in the（）.