If the compass’s magnetic deviation is also 5 degrees west, you’ll add another 5 degrees—if you haven’t adjusted your compass—and you’ll steer to 101 degrees. If you are returning to Cape Canaveral, ...

One of the most taken-for-granted pieces of equipment on a boat is the magnetic compass. The compass is the basic navigational instrument aboard a boat, especially when out of sight of land.

Compass A Story of Exploration and Innovation Alan Gurney W.W. Norton: 320 pp., $ ... and detailing the many devices and theories invented over the years to compensate for this magnetic deviation.

These correct the deviation that can occur from interference caused by your boat’s electronics or other magnetic sources. The correctors are connected to adjustable brass rods installed in the lower ...

Opinion: In this op-ed, retired Navy Capt. John Cordle shares why he chose to retire from his position as a federal worker ...

The magnetic compass always points toward “true north,” based on the Earth’s gravitational field. ... known as deviation, can be corrected. For 45 years, ...