A.Mercator charts／Loran charts
B.Admiralty charts／Routeing charts
C.large scale charts／small scale charts
D.small scale charts／large scale charts
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A.Plotting radio bearings over a long distance
B.Determining latitude and longitude of a fix
C.Measuring rhumb line distances
D.Measuring rhumb line directions
A.warm front at night
B.low pressure area
C.anticyclone
D.lack of frontal activity
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
最新試題
Information for updating nautical charts is primarily found in the（）.
Vessels should not anchor or trawl in the vicinity of pipelines and are（）in the pipeline area shown on the chart.
The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.
（）is the system for the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy.
Generally，（）are used as the track charts on the high sea，（）are used for harbors，inland waters and coastal areas．
The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate? （）
RYUKYU S TO SE 6 BEC 4－5.ISOL SHWRS.SEA 3 M BEC 2 M.SWELL SE 3－4M.This description is likely to be under the heading of（）.
Periodic publications notifying changes in，or additions to，previously published navigational data are（）.
On notification by Admiralty Notice to Mariners that a new edition of one of the books，or a new supplement to one，has been published，it should be obtained（）.
On a nautical chart，the inner ring of a compass rose indicates（）.