Garmin GNS 430 - Manual (Page 34)

26
Emergency Channel
The GNS 430’s emergency channel select provides a quick method of selecting
121.500 MHz as the active frequency in the event of an in-fl ight emergency. The emer-
gency channel select is available whenever the unit is on, regardless of GPS or cursor
status, or loss of the display.
To quickly tune and activate 121.500, press and hold
W
for approximately two seconds.
Stuck Microphone
As mentioned earlier, whenever the GNS 430 is transmitting, a ‘TX’ indication will
appear in the COM window. If the microphone is stuck or accidentally left in the keyed
position, or continues to transmit after the key is released, the COM transmitter will
automatically timeout (or cease transmitting) after 35 seconds of continuous broadcasting.
You’ll also receive a “COM push-to-talk key stuck” message as long as the stuck condition
exists.
Press and hold the
W
(flip-flop) key for two
seconds to activate the 121.500 MHz emer-
gency frequency.
A “COM push-to-talk key stuck” message
appears to warn you of a stuck microphone.
Transmitting is disabled after 35 seconds of
continuous broadcasting.
COM
Emergency Channel
Stuck Mic
1
190-00140-00.indd 26 5/7/2003, 5:16:27 PM