Garmin G5, GFC 500 and GMC

The parts each G5 needs to install: connector, mounting ring and screws. The kit with the lightning protection module is for composite aircraft or where Garmin calls for it.

A battery inside the G5 that keeps it running for up to four hours if the aircraft's electrical system fails, one for each G5.

Without a magnetometer the G5 shows GPS track, not magnetic heading. The GMU 11 gives true heading and lets the G5 work out wind.

An outside air temperature probe lets the G5 show true airspeed, outside air temperature and, with the magnetometer, wind.

The G5 has its own GPS antenna, enough in many installations. Add an external antenna if it cannot see the sky well from the panel.

With a GFC 500 mode controller, the G5 drives Garmin's GSA 28 servos. Roll only holds the wings level and follows a course; pitch and roll also holds altitude; a third servo adds a yaw damper.