单项选择题
A.falls B.rises C.is steady D.is unreliable
On a nautical chart，the inner ring of a compass rose in...
单项选择题On a nautical chart，the inner ring of a compass rose indicates（）.
A.true directions B.compass error C.deviation D.magnetic directions
Navigational warnings are published according to（）.A.th...
单项选择题Navigational warnings are published according to（）.
A.the designed area B.the designated area C.the indicated area D.all area over the world
Many navigational warnings are of a temporary nature，bu...
单项选择题Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by（）.
A.Notices to Mariners B.Sailing Directions C.List of Lights and Signals D.Guide to Port Entries
