A.fish trap areas
B.naval exercise areas
C.underwater cables
D.recommended track lines
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A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
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
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That the scale of any part of a chart to be larger than the scale of the survey is（）.
Charts showing the coast of Mexico are produced by the United States（）.
What information is found in the chart title? （）
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（）.
Every chart is liable to be incomplete（）.
The maximum difference between mean time and apparent time is （）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
What defines a great circle? （）
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.