A.the compass heading is in line with the lubber's line
B.there is no lost motion in the gimbal rings
C.no change of heading by compass is observed if you raise and lower the heeling magnet
D.the gimbal rings do not strike the compass frame when they are tilted
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A.The Flinders bar
B.The heeling magnet
C.Quadrantal soft iron spheres
D.Bar magnets in the binnacle
A.elevation
B.magnetic angle
C.vertical angle
D.dip
A.divisional parts
B.coefficients
C.fractional parts
D.equations
A.compass error
B.latitude
C.variation
D.deviation
A.precession
B.earth rate
C.gyroscopic inertia
D.gravity effect
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
What is an advantage of the magnetic compass aboard vessels?（）
When crossing the magnetic equator the（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
What is the basic principle of the magnetic compass?（）
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
While in drydock your vessel will be belt-gauged.This process involves（）.