单项选择题
A.Amphibious training areas
B.Grounds for dredge spoil
C.Fish trap areas
D.Gunnery exercise areas
单项选择题 The arrangement of charts in the catalogue is（）.
单项选择题 That the scale of any part of a chart to be larger than the scale of the survey is（）.
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.