The Magnetic Compass: Old-School, Low-Tech, and Still in Every Cockpit for a Reason

Nestled quietly at the top of your windshield or on the glareshield, often bouncing slightly with the engine’s rhythm, the magnetic compass might seem like a relic from another era. No power source. No fancy screen. Just a floating card in a bowl of liquid.

But don’t let its simplicity fool you—this humble instrument is still required in every certified aircraft and can be a lifesaver when the high-tech gear calls it quits.

In this article, we’ll take a look at how the magnetic compass works, why it sometimes misbehaves, and how to read it like a pro when flying your trusty small aircraft. Bring your sectional and a sense of humor—because this instrument loves to keep pilots on their toes!