A.complete and often very poor surveys
B.correct and often very good surveys
C.inadequate and often very old surveys
D.adequate and present surveys
您可能感興趣的試卷
你可能感興趣的試題
A.equipment's
B.tools
C.apparatus
D.aids
A.with
B.in
C.by
D.to
最新試題
The soundings on the imperial chart are measured in（）.
The description Racon beside an illustration on a chart would mean a （）.
What defines a great circle? （）
The only cylindrical chart projection widely used for navigation is the （）.
Which information is found in the chart title（）.
Charts showing the coast of Mexico are produced by the United States（）.
A chart position enclosed by a square is a（n）（）.
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.
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 arrangement of charts in the catalogue is（）.