单项选择题
A.deviation minus variation B.variation plus compass course C.combined variation and deviation D.difference between true and magnetic heading
Compass deviation is caused by（）.A.magnetism from the e...
单项选择题Compass deviation is caused by（）.
A.magnetism from the earth's magnetic field B.misalignment of the compass C.magnetism within the vessel D.a dirty compass housing
Before a magnetic compass is adjusted certain corrector...
单项选择题Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the（）.
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
Based on your 2209 fix，which would be a warning that yo...
单项选择题Based on your 2209 fix，which would be a warning that you are being set down on Block Island Sound South Entrance Obstruction Lighted BIS Buoy? （）
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
