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18 Ray54 VHF Radio
Initial contact should always be attempted using low power. You should
switch to high power only when contact can not be made on low power in
emergency situations. This procedure is specified by the FCC but is also part
of marine communications courtesy.
Note: Some channels are limited by regulation to be low power only. If the
HILO operation request is denied, an error tone beeps.
Overriding the Low Output Power Restriction
In the US, channels 13 and 67 can temporarily
override the low power restriction.
➤ To override the LO power restriction on
channels 13 or 67 and transmit at high power:
Press and hold the PTT key on the microphone
as you press and hold the HI/LO key. The TX
power is set to HI power for as long as you hold
down the HI/LO key.