A.High water line
B.Low water line
C.Low water spring line
D.Tide level
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A.Amphibious training areas
B.Grounds for dredge spoil
C.Fish trap areas
D.Gunnery exercise areas
A.on a regional basis
B.on a national basis
C.shown orderly
D.appeared from A to W
A.very rare
B.common
C.often
D.reasonable
A.SW of Cocos Islands
B.oceanic dangers or seamounts
C.undiscovered dangers
D.the continental shelf
A.a small error in bearing or in laying it down on the chart has a greater effect in misplacing the position the longer the line to be drawn
B.all scales are kept updated for vital information by Notices to Mariners
C.the larger the scale of the chart，the greater the detail that can be shown on it
D.the mariner using the medium scale charts for passage along a coast need not transfer on to a large scale for short distances
最新試題
What defines a great circle? （）
The arrangement of charts in the catalogue is（）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
The shoreline on charts generally represents the mean（）.
Charts showing the coast of Mexico are produced by the United States（）.
Which aid is NOT marked on a chart with a magenta circle? （）
The revision date of a chart is printed on which area of the chart? （）
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）