A.active weather disturbances such as hurricanes or tropical storms
B.the latest navigational warnings
C.scheduled vessel arrivals and departures for a 24-hour period
D.water levels at river ports where run-off affects tidal heights
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A.Overhead power lines
B.Louisiana-Mississippi ferry crossings
C.Two railroad trestles
D.Two submerged oil pipelines
A.fish trap area
B.pipeline
C.demarcation line
D.cable area
A.cloud movement
B.vessel heading
C.waves
D.swells
A.extremely cold air from shore passes over warmer water
B.warm dry air from shore passes over cooler water
C.cold ocean water evaporates into warm air
D.cool rain passes through a warm air mass
A.FORECAST
B.GALE WARNING
C.SYNOPSIS
D.STORM WARNING
最新試題
On the approach of a warm front the barometric pressure usually（）.
LOW AT 34N 135E ESLY SLWLY INTST NC．This description is most likely to be under the heading of（）.
What is the most important source of information to be used in correcting charts and keeping them up to date（）.
Which is a weekly publication advising mariners of important matters affecting navigational safety（）.
On the high seas，a fog signal consisting of one prolonged blast followed by four short blasts would indicate the presence of a（）.
The height of a tide can be increased by（）.
Periodic publications notifying changes in，or additions to，previously published navigational data are（）.
In revised editions of Admiralty charts the（）are corrected first．
Generally，（）are used as the track charts on the high sea，（）are used for harbors，inland waters and coastal areas．
For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?（）