Deviation is the difference between magnetic bearing and which other bearing?

Deviation is the difference between magnetic bearing and which other bearing?

• A. Compass bearing
• B. True bearing
• C. Gyro bearing
• D. Navigational bearing

Answer: (A)

Deviation is the angular difference between the magnetic bearing and the compass bearing, caused by the ship’s own magnetic interference. The compass bearing is what your compass shows, while the magnetic bearing is measured relative to magnetic north. So deviation tells you how far the compass reading is off from the true magnetic direction. For example, if the magnetic bearing to a buoy is 120 degrees and the compass shows 116 degrees, the deviation is 4 degrees. (You use this to convert between compass and magnetic bearings as you navigate.)

Deviation is the angular difference between the magnetic bearing and the compass bearing, caused by the ship’s own magnetic interference. The compass bearing is what your compass shows, while the magnetic bearing is measured relative to magnetic north. So deviation tells you how far the compass reading is off from the true magnetic direction. For example, if the magnetic bearing to a buoy is 120 degrees and the compass shows 116 degrees, the deviation is 4 degrees. (You use this to convert between compass and magnetic bearings as you navigate.)