iv Fishfinder 90/140 Owner’s ManualINTRODUCTION > TABLE OF CONTENTSTABLE OF CONTENTSIntroduction...........................................................iiiManual Conventions .....................................................iiiProduct Registration ................................................ vContact Garmin.............................................................. vWarning .................................................................... viGetting Started.......................................................1Understanding the Fishfinder ................................. 1Understanding Sonar ..................................................... 1Understanding Dual Beam Transducer Coverage ......... 2Understanding the Fishfinder Screen ............................. 3Using Simulator Mode ............................................. 4Installing Your Fishfinder .....................................5Installing the Transducer ......................................... 6Mounting the Transducer on a Transom ........................ 7Installing the Fishfinder Unit ................................. 10Selecting a Fishfinder installation Location ................ 10Mounting the Bracket Assembly ................................. 10To install the Fishfinder on the mount bracket: ........... 11Installing the Wiring Harness ................................ 12Testing the Transom Mount Installation ............... 13Operating Your Fishfinder ..................................14Understanding Basic Functions ........................... 14Using the Main Menu ............................................. 15Options and Settings .................................................... 15Using the Setup Menu ............................................ 16Options and Settings .................................................... 16Appendix ..............................................................19Specifications ......................................................... 19Fishfinder 90 ................................................................ 19Fishfinder 140 .............................................................. 19Fishfinder 90 and Fishfinder 140 ................................. 19Optional Accessories ............................................. 19Caring for the Fishfinder ....................................... 20Cleaning the Case ....................................................... 20Cleaning the Screen ..................................................... 20Storage ......................................................................... 20Water Immersion ......................................................... 20Software License Agreement ................................ 21Limited Warranty .................................................... 21Declaration of Conformity (DoC) .......................... 23Tell Us What You Think .............................................. 23Index .....................................................................24