VHF 300 Series Owner’s Manual iiiIntroductionTable of ContentsIntroduction...............................................................................................................iManual Conventions ............................................................................................................ iiGetting Started.........................................................................................................1Garmin GHS Series Handsets ............................................................................................. 1Garmin GHS Series Handset Display .................................................................................. 2Tips ...................................................................................................................................... 3Basic Operation .......................................................................................................4Turning the Radio On and Off .............................................................................................. 4Adjusting the Volume ........................................................................................................... 4Adjusting the Squelch .......................................................................................................... 4Selecting Channels .............................................................................................................. 4Transmitting with the Radio.................................................................................................. 4Bypassing the LO (1 W) Transmission Power Setting ......................................................... 5Scanning and Saving Channels ........................................................................................... 5Repeating the Last Received Communication ..................................................................... 6Monitoring Multiple Channels............................................................................................... 6Reprogramming the Second-Priority Channel ..................................................................... 7Using 16/9 Mode .................................................................................................................. 7Switching Between 1 W and 25 W Transmitting Modes ...................................................... 8Adjusting the Local/Distant Receiving Sensitivity ................................................................ 8Using the Intercom ............................................................................................................... 9Using the Hailer ................................................................................................................... 9Using the Foghorn ............................................................................................................. 10Listening to NOAA Weather Broadcasts and Enabling Weather Alerts ............................. 11Automatic Transmitter Identification System ...................................................................... 12Digital Selective Calling ........................................................................................14Entering Your MMSI Number ............................................................................................. 14Viewing Your MMSI Number .............................................................................................. 15DSC Distress Calls ............................................................................................................ 15Placing Calls ...................................................................................................................... 18Receiving Calls .................................................................................................................. 20Position Tracking................................................................................................................ 21Working with the Call Logs ................................................................................................ 23Using the Directory ............................................................................................................ 25Adding and Modifying Group Entries ................................................................................. 26Configuring DSC Settings .................................................................................................. 26Sending Voicemail ............................................................................................................. 28Automatic Identification System ......................................................................................... 28