A.is decreased
B.decreased
C.decreases
D.are decreased
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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
A.does not change
B.improves rapidly
C.improves only slightly
D.becomes poor
A.stop
B.to stop
C.stopping
D.stopped
最新試題
The fog most commonly encountered at sea is called（）.
Why is a warning sign displayed at the gangway or access point of a barge during cargo transfer（）.
Which is a weekly publication advising mariners of important matters affecting navigational safety（）.
What is the most important source of information to be used in correcting charts and keeping them up to date（）.
The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.
Information for updating nautical charts is primarily found in the（）.
The Daily Memorandum contains information on（）.
Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by（）.
Navigational warnings are published according to（）.
Periodic publications notifying changes in，or additions to，previously published navigational data are（）.