A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
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A.High water line
B.Low water line
C.Low water spring line
D.Tide level
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
最新試題
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
On a Mercator chart，1 nautical mile is equal to（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
Which information is found in the chart title（）.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
The shoreline on charts generally represents the mean（）.
The maximum difference between mean time and apparent time is （）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.
The short-long dashed magenta line around Gardiners Island marks（）.