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
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Navigational warnings are published according to（）.
Steam smoke will occur when（）.
Which is a weekly publication advising mariners of important matters affecting navigational safety（）.
The Daily Memorandum contains information on（）.
The range of a light on Admiralty Charts is normally the（）.
The best estimate of the wind direction at sea level can be obtained from observing the direction of the（）.
Section V of the ADMIRALTY NOTICES TO MARINERS is（）.
Vessels should not anchor or trawl in the vicinity of pipelines and are（）in the pipeline area shown on the chart.
On the high seas，a fog signal consisting of one prolonged blast followed by four short blasts would indicate the presence of a（）.
Weekly Notices are dated for the（）appropriate to the week they are issued on the UKHO website.