Operation6Using the VHF GMDSSBasic functionsSwitching the radio on and off• To switch the radio on, turn the knob at the topof the radio clockwise.The display lights up showing the last usedchannel and the battery level.• To switch the radio off, Turn the knob backcounter-clockwise until it clicks.Selecting the working channel• To select channel 16 (Distress or Safety), press the 16/C key.• To select the Call channel, use a long press on 16/C.• To select among all available channels, press S or T on the keypad.For fast selection, press and hold S or T.The display shows the currently selected channel.Note Before using the radio, mount the antenna at the top of theradio. The antenna is delivered with the radio.Note Long press on S or T can also be used to select preferredchannels. For information on how to program preferredchannels, seeConfiguring the VHF GMDSS on page 10.0643