GPSMAP 3005C Owner’s Manual iiiINTRODUCTION > TABLE OF CONTENTSMap Page ....................................................................................................... 33Using the Map Pointer ............................................................................................34Selecting Map Ranges ............................................................................................35Cartography ............................................................................................................35Map Page Options ..................................................................................................36Map Split Page .............................................................................................. 38Compass Page .............................................................................................. 38Highway Page ............................................................................................... 39Changing the Highway Perspective Range ............................................................40Highway Page Options ...........................................................................................40Showing or Hiding Cartography.............................................................................40Main Menu .............................................................................................. 41GPS Tab ......................................................................................................... 41Tide Tab ......................................................................................................... 42Tide Sub Tab ...........................................................................................................42Current Sub Tab ......................................................................................................44Celestial Tab ................................................................................................. 45Trip Tab .......................................................................................................... 46Weather Tab .................................................................................................. 47Points Tab ..................................................................................................... 47Routes Tab .................................................................................................... 48Tracks Tab ..................................................................................................... 49DSC (Digital Selective Calling) Tab ............................................................. 50Understanding DSC Distress Calls .........................................................................51Understanding Position Reports .............................................................................51Review DSC Waypoint ...........................................................................................51Setting Up DSC ......................................................................................................52Using the NAV Key ................................................................................................52Card Tab ........................................................................................................ 53Messages Tab ............................................................................................... 54Viewing Detailed Message Information .................................................................54Alarms Tab .................................................................................................... 55System Alarms ........................................................................................................55Nav (Navigation) Alarms........................................................................................56Sonar Alarms* ........................................................................................................56System Tab ................................................................................................... 57Update Sub Tab.......................................................................................................62Network Tab .................................................................................................. 62Pages Tab ...................................................................................................... 63Map Tab ......................................................................................................... 64AIS Sub Tab ............................................................................................................67Temp (Temperature) Tab .............................................................................. 69Sonar Tab ...................................................................................................... 69Highway Tab ................................................................................................. 70XM Tab ........................................................................................................... 70Using Favorites .......................................................................................................71Using Sonar ........................................................................................... 72Understanding Sonar ................................................................................... 72Using Dual Frequency ............................................................................................72Using Dual Beam....................................................................................................72Understanding the Sonar Display ...........................................................................73SONAR PAGE ............................................................................................... 74Configuring the Sonar Page ....................................................................................75Using the Sonar Adjustment Menu .........................................................................76Using the Pointer on the Sonar Page ......................................................................77Marking an Underwater Waypoint .........................................................................78Sonar Tab ...................................................................................................... 78General Sub Tab .....................................................................................................78Graph Sub Tab ........................................................................................................79Water Temp Sub Tab ...............................................................................................80