Garmin G3X Touch Pilot's Manual page 136

CNS Interface
Pilot Isolation mode isolates the Pilot from other ICS positions (Copilot and
Passengers). The Copilot and Passengers share communication between themselves
but cannot communicate with the Pilot or hear the pilot's selected radios.
Crew Isolation mode places the Pilot and Copilot on a common ICS communication
channel. The Passengers are on their own intercom channel and can communicate
with each other, but cannot communicate with the Pilot and Copilot or hear the pilot's
selected radios.
MORE OPTIONS...
The More Options button allows access to the 3D Audio and Muting functions.
114
Garmin G3X Touch
Intercom Tab, More Options Button Selected
™ Pilot's Guide for Certified Aircraft
190-02472-00 Rev. D