iv123456789101112FOREWORD .................................................................................. iIMPORTANT ................................................................................... iEXPLICIT DEFINITIONS ................................................................ iIN CASE OF EMERGENCY ........................................................... iiNOTE .............................................................................................. iiRADIO OPERATOR WARNING .................................................... iiiTABLE OF CONTENTS ................................................................. ivPRECAUTIONS ............................................................................. v1 OPERATING RULES ............................................................... 12 PANEL DESCRIPTION ........................................................ 2–6■ Panel description .................................................................. 2■ Function display .................................................................... 4■ Speaker microphone ............................................................. 63 BASIC OPERATION .......................................................... 7–12■ Channel selection ................................................................. 7■ Receiving and transmitting ................................................... 9■ Call channel programming .................................................. 10■ Microphone lock function .................................................... 10■ Display backlight ................................................................. 10■ Channel comments ............................................................. 11■ AquaQuake water draining function .................................... 11■ Optional Voice scrambler operation .................................... 124 DUALWATCH/TRI-WATCH .................................................... 13■ Description .......................................................................... 13■ Operation ............................................................................ 135 SCAN OPERATION ......................................................... 14–15■ Scan types .......................................................................... 14■ Setting TAG channels ......................................................... 15■ Starting a scan .................................................................... 156 DSC OPERATION ............................................................ 16–38■ MMSI code programming ................................................... 16■ DSC address ID .................................................................. 16■ Position and Time programming ......................................... 18■ Position and Time display ................................................... 19■ GPS information display ..................................................... 19■ Distress call ........................................................................ 20■ Transmitting DSC Calls ....................................................... 23■ Receiving DSC Calls .......................................................... 34■ Received messages ........................................................... 40■ DSC Set mode .................................................................... 417 OTHER FUNCTIONS ....................................................... 43–46■ Intercom operation .............................................................. 43■ Hailer operation .................................................................. 44■ Automatic foghorn ............................................................... 45■ RX speaker function ........................................................... 468 SET MODE ....................................................................... 47–49■ Set mode programming ...................................................... 47■ Set mode items ................................................................... 479 CONNECTIONS AND MAINTENANCE ........................... 50–57■ Connections ........................................................................ 50■ Fuse replacement ............................................................... 51■ Supplied accessories .......................................................... 51■ Antenna .............................................................................. 51■ Mounting the transceiver .................................................... 52■ MB-75 installation ............................................................... 53■ UT-112/UT-98 installation .................................................... 54■ HM-157/HM-162 installation ............................................... 5510 TROUBLESHOOTING ............................................................ 5811 SPECIFICATIONS AND OPTIONS .................................. 59–60■ Specifi cations....................................................................... 59■ Options ................................................................................ 6012 CHANNEL LIST ..................................................................... 61TABLE OF CONTENTS