GPSMAP 3005C Owner’s Manual IntroductIon > tAble of contents3D Highway Page .................................................................. 39Changing the Highway Perspective Range .................................. 403D Highway Page Options ........................................................... 40Showing or Hiding Map Details ................................................... 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 .............................................................................. 55Sonar Alarms* .............................................................................. 56Weather Alarms** ........................................................................ 56System Tab............................................................................. 57Update Sub Tab............................................................................. 62Network Tab ........................................................................... 62Pages Tab ............................................................................... 63Map Tab .................................................................................. 64AIS Sub Tab .................................................................................. 67Radar Tab ............................................................................... 68Temp (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 ..................................................................... 80XM WX Weather .................................................................81Customizing Preset Weather Displays ................................ 81Weather Tab ........................................................................... 83Marine Bulletins Sub Tab ............................................................. 83Using Radar .......................................................................84Understanding Radar ............................................................ 84Understanding the Radar Display ................................................. 85