单项选择题
A.Amphibious training areas B.Grounds for dredge spoil C.Fish trap areas D.Gunnery exercise areas
The arrangement of charts in the catalogue is（）.A.on a ...
单项选择题The arrangement of charts in the catalogue is（）.
A.on a regional basis B.on a national basis C.shown orderly D.appeared from A to W
That the scale of any part of a chart to be larger than...
单项选择题That the scale of any part of a chart to be larger than the scale of the survey is（）.
A.very rare B.common C.often D.reasonable
Particular care is needed when navigating in the vicini...
单项选择题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.
A.SW of Cocos Islands B.oceanic dangers or seamounts C.undiscovered dangers D.the continental shelf
