A.Compass error and variation are equal B.Compass north will be true north C.Variation will equal deviation D.There will be no compass error
A.Its accuracy remains the same at all latitudes B.It seeks the true meridian C.It can be used near the Earth's magnetic poles D.If an error exists，it is the same on all headings
A.before correcting for any deviation B.after correcting for variation C.after adjusting the fore-and-aft and athwartships permanent magnets D.before the quadrantal correctors are placed on the compass
A.east B.west C.north D.south
A.GPS B.GMDSS C.AIS D.Navtex
