How To Calculate Magnetic Compass Deviation

Inspiration How To Calculate Magnetic Compass Deviation, Other components of the magnetic field may be calculated using the magnetic field calculator.

How to calculate magnetic compass deviation. The second is magnetic deviationthe angular difference between magnetic north and the. Deviation coecients of magnetic compass are a basis to determine the compass deviation as well as to establish the table for compass deviation which is considered as technical certi cate for magnetic compass equipped on board the ship. Correcting a compass from true to compass and back. Magnetic variation is due to the differing positions of the geographic north pole and the magnetic north pole.

This calculator may be used to calculate the magnetic declination for a specified location and date based on the international geomagnetic reference field model. To calculate the compass course by the true course or vice versa you should set the values of magnetic declination for given location and your compass deviation in the corresponding fields of the calculator. Magnetic declination changes over time and with location. This video explains magnetic declination and how it relates to the use of a map and compass.

Discrepancy of magnetic and true poles magnetic declination. Declination is positive east of true north and negative when west. Learn how to use the magnetic declination with a compass. Compasses are used to determine the direction of true northhowever the compass reading must be corrected for two effects.

I address this in my book stay. When printed maps were the only way of getting this information the declination values were somewhat out of date by the time the maps got to the general public. The boats compass and a hand bearing compass point to the magnetic pole but all bearings on charts are related to the geographic pole true north. The first is magnetic declination or variationthe angular difference between magnetic north the local direction of the earths magnetic field and true north.

I failed to mention in the video that declination changes over time. This feature is not available right now. Magnetic declination sometimes called magnetic variation is the angle between magnetic north and true north. Please try again later.

Unfortunately declination values are constantly changing. The default values calculate the compass course for the transition from.