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
Vessels should not anchor or trawl in the vicinity of pipelines and are（）in the pipeline area shown on the chart.
For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?（）
Which is the correct procedure for anchoring a small to medium size vessel in deep water （）.
The Daily Memorandum contains information on（）.
（）is the system for the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy.
Navigational warnings are published according to（）.
The fog most commonly encountered at sea is called（）.
Navigational warnings and weather bulletins for shipping（）from Singapore Radio.
Periodic publications notifying changes in，or additions to，previously published navigational data are（）.
In revised editions of Admiralty charts the（）are corrected first．