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Changing the Channel
Press the Channel Up and Channel Down buttons briefly to scroll through the channels
one channel at a time. Press and hold the Channel Up or Channel Down buttons to
quickly scroll through the channels.
Saving the Channel into Memory
Press and hold GPS/MEM. MEM displays on the screen to indicate that that channel is now
stored in memory. Press and hold GPS/MEM again to remove the channel from memory.
Using the Strobe/Flashlight
You can use this radio in an emergency. If you press and hold WX/SOS, the radio turns on
the high-intensity LED strobe on your radio. The LED flashes "S O S" in international Morse
Code.
nOte: your radio operates normally when the sOs strobe is activated. however, the sOs key
#
is disabled during key lock and MenU operation.
1.
Press and hold WX/SOS. The LED lights in the SOS Morse Code pattern.
2.
Press and hold WX/SOS again. The LED stays on.
3.
Press and hold WX/SOS again. The LED goes off.
Digital seleCtiVe Calling FeatUres
What is DsC?
Digital Selective Calling (DSC) is a standard that allows you to call other stations using
their unique identification code (the Maritime Mobile Service Identity or MMSI number), just
like you would call a phone number. To call another station, just enter that station's MMSI
number and choose the voice channel you want to talk on. The radio uses channel 70 to
transmit your MMSI number to the other station along with the voice channel you requested.
If the other station accepts your call, both radios automatically switch to the requested voice
channel so you can talk to the other station.
DSC provides a system for automated distress calls. At the touch of a button, the radio can
transmit your MMSI number, the nature of your distress, and your current position based on
data from your GPS receiver. The radio repeats the distress call every few minutes until it
receives an acknowledgement.
The DSC standard dedicates a VHF channel—channel 70—to digital transmissions only.
Since digital transmissions require less bandwidth voice transmissions, channel 70 avoids
the problems of busy voice channels.
aDVanCeD DsC FeatUres
Your radio supports the following DSC features:
Feature
Individual Call
Group Call
Menu Item
Function
Individual
Contact another vessel from your directory.
Group
Contact all vessels that share your group MMSI code.
Uniden MHS235 Radio Owner's Manual
E-17
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