Setting the Receiving Sensitivity
You can control the receiving sensitivity of the radio. When you have noise in high-traffic areas or areas with
electromagnetic interference, such as near cell-phone towers, you can set the receiving sensitivity to LOC to
decrease receiver sensitivity. In remote areas and on open water, you can set the receiving sensitivity to DIST to
ensure that you use the maximum range of the receiver.
1 Select HI/LO.
2 Select an option:
• Select LOC to enable local sensitivity.
• Select DIST to enable distant sensitivity.
Switching Between 1 W and 25 W Transmitting Modes
You can control the transmitting power of the radio. Low (1 W) is used for local transmissions, and high (25 W)
is used for distance and distress transmissions.
When two signals broadcast on the same frequency, a VHF radio receives only the stronger of the two signals.
You should transmit calls other than distress calls using the lowest power setting that allows you to
communicate, to reduce the possibility that your transmissions interfere with the transmissions of others.
In the USA channel band, transmissions on channels 13, 17, 67, and 77 must be low (1 W) by default.
In the Canadian channel band, transmissions on channels 13, 15, 17, 20, 1066, 67, 75, 76, and 77 must be low
(1 W) by default.
In the International channel band, transmissions on channels 15, 17, 75, and 76 must be low (1 W).
NOTE: In the USA and Canadian channel bands, you can bypass the power setting for these channels
temporarily during transmission (
Bypassing the Low Transmission Power Setting, page 9
). In the International
channel band, the radio does not permit transmissions on these channels to be changed to high (25 W).
1 Select HI/LO.
2 Select 1W or 25W.
3 Select OK.
Bypassing the Low Transmission Power Setting
In the USA and Canadian frequency bands, transmissions on select channels are required to be low-power (1 W)
by default, because they are intended for intership (bridge-to-bridge) communication (
and 25 W Transmitting Modes, page 9
). If other radios cannot receive these channels due to the low power
setting, you can bypass the default restriction during transmission.
NOTE: In the International channel band, the radio does not permit transmissions on these select channels to be
changed to high (25 W).
1 From a USA or Canadian channel set to low power by default, such a 13,17, or 77, hold PTT.
2 While transmitting, select 25W.
Basic Operation
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