What indicators are the Garmin GNC-255A & GNC-255B Nav/Com radios compatible with?
The Garmin GNC-255A and GNC-255B radios are compatible with a variety of indicators including the Garmin GI-102A and GI106A as well as the King KI-202, KI-203, KI-204, KI-206, KI-208, KI-208A, KI-209, KI-209A.