Uniden MHS235 English Owner's Manual - Page 21

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 Individual Group Function Contact another vessel from your directory. Contact all vessels that share your group MMSI code. Uniden MHS235 Radio Owner's Manual E-17