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GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Appendix
Voice Command Instructions
1. Press and hold the Push to Command (PTC) switch.
2. Speak the entire command into the headset MIC.
3. Release the "PTC" switch.
• A positive tone (low-to-high) indicates the command has been
recognized and executed. (i.e., page changed, radio tuned, MIC
selected, etc.)
• A negative tone (high-to-low) indicates the command is either
unrecognizable or invalid.
Successful Command Example
"Show approaches page” is spoken, the approach selection page displays
immediately, and a positive tone sounds.
Unsuccessful Command Examples
"Show map page” is spoken and the traffic page displays.
"Show map page" is spoken and a negative tone sounds.
Qualification Procedure
Speak the non-bold phrase if the voice command for a procedure is not
applicable to the aircraft’s configuration. If the total number of successful
commands is less than 17, the voice commands must be disabled. For instructions
on how to activate and deactivate voice commands, refer to section 15.13.
Example: If the requirement states a COM radio is required, but your GTN
does not a have a COM radio, use the unbold command.
1. Start the GTN and acquire a GPS position.
2. Conduct the voice commands in sequential order while wearing
an aviation headset. If necessary, a command can be attempted
twice.
3. When the command is successful check the box next to the
command.
Summary of Contents for GTN 625
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