GPS jamming is emerging as an increasingly prevalent — and troubling — weapon of war

The war with Iran is laying bare the dangers posed to commercial ships and planes by the rise of GPS interference in and around conflict zones.
Hackaday

Building A Heading Sensor Resistant To Magnetic Disturbances

Light aircraft often use a heading indicator as a way to know where they’re going. Retired instrumentation engineer [Don Welch] recreated a heading indicator of his own, using cheap ...