A.Decreasing loran readings on 9960-W
B.Visual bearings of Montauk Point Lt.changing to the left
C.Increasing bearings of Southeast Point Light
D.Decreasing soundings
第1题
A.Fore-and-aft and athwartships magnets
B.Dip needle and heeling magnet
C.Heeling magnet and Flinders bar
D.Flinders bar and quadrantal spheres
第2题
A.Flinders bar
B.Transverse magnets
C.Fore-and-aft magnets
D.Soft iron spheres on the sides of the compass
第3题
A.21-Aug-99
B.21-Sep-99
C.October 31,1999
D.31-Dec-99
第4题
A.2° while the vessel is on an intercardinal heading
B.1° while the vessel is on a compass heading of 000°
C.2° and is constant on all headings
D.1° while the vessel is on a compass heading of 180°
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