Method of correcting HE of Compass:
Two ways: For small ship and for large ship.
(1) For small ship:
Steady the vessel on N or S compass heading.
Heel the vessel by 5 or 10 degrees.
Remove any heeling error by inserting heeling error magnet in HE bucket.
(2) For large ship:
Use heeling error instrument “VFI”
Vessel should be upright.
Remove any heeling error by inserting heeling error magnet in HE bucket.