Magnetic compass: The coefficients are the mathematical ... - Rajnav

Additional questions:
How to correct heeling error if noVFI available
Head the vessel on the North/South course and Heel the vessel and adjust the heeling error magnets and bucket
position to correct deviation due to heeling error.
What is the distance of the corrector from the compass needle
Not less than twice the length of the correctors in order tohave a uniform correcting magnetic filed.
Vessel heading east – Deviation is 9 degrees, you found the Blue end of the corrector in forward position,how
will you correct
This ship has a Red forward hence has been corrected by using the blue end forward. But too much of Blue
corrector so either reduce the Magnet or increase the distance to reduce the deviation by 8 degrees
Vessel heading SE- westerly deviation how to correct
Bring the quadrantal error correctors (Kelvin’s spheres) more close as they are supposed to produce +E
correction
Vessel laid up in Fleetwood for 2 months and now proceeding of westerly heading found large deviation what is
the deviation likely to be easterly or westerly?
Easterly
Why is the ship swung slowly
To avoid gaussing error