Nav and comm antennas should be located away from any projections, engines, and propellers. Nav antennas should be mounted symmetrically with the centerline of the aircraft. The nav antenna should also be located away from landing gear doors, access doors, or other openings that would break the ground plane of the antenna. The ground plane surface directly beneath the Comm antenna should be a flat plane over as large of an area as possible.

To prevent RF interference, the antennas must be mounted a minimum distance of 3 feet from the nav/comm radio and wiring harness. Antennas should also be mounted a minimum of 6 feet from the DME antenna and 4 feet from the ADF sense antenna.