ii GPSMAP 198C Sounder Owner’s ManualINTRODUCTION > TABLE OF CONTENTSTable of ContentsIntroduction...........................................................................iAbout This Manual ................................................................... iWarning ................................................................................... ivCaution .................................................................................... ivBasic Operation ...................................................................1Initializing the Receiver .......................................................... 1Simulator Mode ....................................................................... 3Adjusting the Backlight .......................................................... 4Interface Keys .......................................................................... 5Entering Data and Selecting Options .................................... 6Using the Map Pointer ............................................................ 7Creating and Using Waypoints .............................................. 8Man OverBoard (MOB) .......................................................... 10Reviewing and Editing Waypoints ....................................... 11Navigating to a Destination .................................................. 12Routes .................................................................................... 17Find ........................................................................................ 19Additional Information .......................................................... 21DSC ......................................................................................... 22Main Pages .........................................................................26Map Page ................................................................................ 27Compass Page ....................................................................... 33Numbers Page ....................................................................... 34Highway Page ........................................................................ 35Active Route Page ................................................................. 37Main Menu ..........................................................................39GPS Tab .................................................................................. 39Tide Tab .................................................................................. 43Trip Tab ................................................................................... 46Celes (Celestial) Tab ............................................................. 47Points Tab .............................................................................. 48Routes Tab ............................................................................. 53Track Tab ................................................................................ 59DSC Tab .................................................................................. 61Card Tab ................................................................................. 62Time Tab ................................................................................. 62Pages Tab ............................................................................... 63Map Tab .................................................................................. 64Hiway (Highway) Tab ............................................................. 68Temp (Temperature) Tab ....................................................... 68Sonar Tab ............................................................................... 68Systm (System) Tab .............................................................. 69Units Tab ............................................................................... 70Comm (Communications) Tab ............................................. 72Alarm Tab ............................................................................... 76Using Sonar .......................................................................78Sonar Page ............................................................................. 78Sonar Tab Options ................................................................ 85Understanding Sonar ............................................................ 89