单项选择题

Error may be introduced into a magnetic compass by（）.

A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above

相关考题

Due to GPS roll over of the clock cycle，GPS receivers m...

单项选择题Due to GPS roll over of the clock cycle，GPS receivers may give the wrong time and position or may lock up permanently on（）.

A.21-Aug-99
B.21-Sep-99
C.Octoer 31，1999
D.31-Dec-99

Deviation which is maximum on intercardinal compass hea...

单项选择题Deviation which is maximum on intercardinal compass headings may be removed by the（）.

A.Flinders bar
B.transverse magnets
C.fore-and-aft magnets
D.soft iron spheres on the sides of the compass

Deviation is the angle between the（）.A.true meridian an...

单项选择题Deviation is the angle between the（）.

A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian

GPS、DF及LC的使用

Error may be introduced into a magnetic compass by（）.