你可能感興趣的試題

At the magnetic equator there is no induced magnetism in the vertical soft iron because（）.

A.the lines of force cross the equator on a 0°-180°alignment
B.the quadrantal error is 0°
C.there is no vertical component of the Earth's magnetic field
D.the intercardinal headings have less than 1°

單項選擇題

A vessel’s position should be plotted using bearings of（）.

A.buoys close at hand
B.fixed known objects on shore
C.buoys at a distance
D.All of the above

In plotting a running fix，how many fixed objects are needed to take your lines of position from? （）

你可能感興趣的試題

At the magnetic equator there is no induced magnetism in the vertical soft iron because（）.

A vessel’s position should be plotted using bearings of（）.

In plotting a running fix，how many fixed objects are needed to take your lines of position from? （）