ivTABLE OF CONTENTSIN CASE OF EMERGENCY .................................................. iRECOMMENDATION ............................................................ iFOREWORD ........................................................................ iiIMPORTANT ......................................................................... iiEXPLICIT DEFINITIONS ...................................................... iiFEATURES ........................................................................... iiPRECAUTION ..................................................................... iiiTABLE OF CONTENTS ....................................................... ivINTRINSIC SAFETY............................................................. v1 OPERATING RULES .......................................................12 SUPPLIED ACCESSARIES AND ATTACHMENTS ....2–33 PANEL DESCRIPTION................................................4–7■ Front, top and side panels ............................................4■ Function display ...........................................................64 BASIC OPERATION ..................................................8–12■ Channel selection .........................................................8■ Receiving and transmitting .........................................10■ Adjusting the squelch level .........................................11■ Automatic backlighting ...............................................11■ Lock function ..............................................................11■ Call channel programming .........................................12■ Voice scrambler operation ..........................................125 SCAN OPERATION .................................................13–14■ Scan types .................................................................13■ Setting TAG channels .................................................14■ Starting a scan ...........................................................146 DUALWATCH/TRI-WATCH ............................................15■ Description .................................................................15■ Operation....................................................................157 LAND (PMR) CHANNEL OPERATION .........................16■ LAND (PMR) Channel Group ....................................16■ Function display.........................................................168 SET MODE ..............................................................17–21■ Set mode programming ..............................................17■ Set mode items ..........................................................189 BATTERY CHARGING ............................................22–25■ Battery charging .........................................................22■ Cautions .....................................................................22■ AD-100 installation .....................................................24■ Optional battery chargers ...........................................2510 SPEAKER-MICROPHONE ............................................26■ HM-138 Description ...................................................26■ Attachments ...............................................................2611 TROUBLESHOOTING ...................................................2712 VHF MARINE CHANNEL LIST .....................................2813 SPECIFICATIONS .........................................................2914 OPTIONS .......................................................................3015 QUICK REFERENCE ....................................................3116 DOC ...............................................................................3217 ATEX CAUTIONS ..........................................................33