Compass course is a navigational term that refers to the directional course set by a ship or aircraft, corrected for the errors caused by magnetic variations and deviations. It is a true course that takes into account the magnetic declination or variation, which is the difference between true north and magnetic north, as well as the compass deviation, which is the error caused by the magnetic fields of the ship or aircraft. The compass course is determined using a compass or other navigational instruments, and is essential for ensuring accurate navigation and safe travel. By accounting for the magnetic errors, the compass course provides a more precise and reliable indication of the direction of travel, helping the navigator to stay on track and reach their intended destination.
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