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
In revised editions of Admiralty charts the（）are corrected first．
Which would influence a magnetic compass（）.
Which is a weekly publication advising mariners of important matters affecting navigational safety（）.
Information for updating nautical charts is primarily found in the（）.
What is the most important source of information to be used in correcting charts and keeping them up to date（）.
The fog most commonly encountered at sea is called（）.
Navigational warnings and weather bulletins for shipping（）from Singapore Radio.
The Daily Memorandum contains information on（）.
Why is a warning sign displayed at the gangway or access point of a barge during cargo transfer（）.
Weekly Notices are dated for the（）appropriate to the week they are issued on the UKHO website.