The Heading Indicator (Directional Gyro) - YouTube
The Remote Indicating Compass (Slaved Gyro Compass) - YouTube
Principle of a directional gyro aided by a magnetic compass. | Download Scientific Diagram
The Sky's The Limit - <<Heading indicator>> <<Direction Indicator>> <<Flight Instruments 101>> <<Basic 6 Pack #5 H.I / D.I>> The heading indicator is a flight instrument used in an aircraft to inform
direction / heading indicator
F4U gyro and compass fix - General discussions - IPACS Aerofly Forum
R.C. Allen Instruments Directional Gyro Indicator Aircraft Gauge | eBay