4 Fishfinder 340C Owner’s ManualIndexIndexSymbols200 kHz frequency 22X zoom 3650 kHz frequency 2AA-scope 37accessories 1, 42adj/menu key 22adjustment menu 34for the split sonar page 24alarms 30, 43alarms tab 30anti-reflective coating iiiarches 4assembling the transducer 9automatic scroll speed 28auto color gain 28Bbacklight key 22backlight setting 21basic display 37battery alarm 31beam 35bearing 38beeper 32bottom of the water 4bracket assembly 6brg (bearing) 38Ccables 5calibrate water speed 29CANet™ icase, cleaning the iiichange a setting 26changing the data fields on the num-bers page 26cleaning the case iiicleaning the screen iiiclutter 4cnfg key 22cog (course over ground) 38color 4color bar 37color scheme 27contact Garmin iiicurrent time and current date 34custom range 27Ddata/cnfg key 22data fields 24, 26, 37date 34daylight saving time 34dcog (desired course over ground) 38Declaration of Conformity 45defaults 32definitions, data field 38depth 24, 33, 35, 37, 41depth line 36depth units 33distance units 33dist next (distance to next) 38dpt (depth) 38drift alarm 31dual beam 3dual frequency 2, 24Eenable NMEA input/output 40enter key 22extended data setup 37extended display 37Ffactory settings 32field definitions 38fish alarm 31fish symbols 4, 27flasher page 25flush mounting the fishfinder 7frequency 36200 kHz 250 kHz 2fuse 15, 42Ggain 35, 37gain key 22gain setting 4GPS, wiring to a 16graphsauto gain 28Whiteline 35graph tab 27Hhardness of the bottom 4hard bottom 25hard structure 4heading 33Iimmersion, water iiiinput voltage 15installation 20installation, shoot-thru-hull 13installingthe unit on the mount bracket 7the wiring harness 15installing the fishfinder 5interfacing 16Kkeel offset 28keypad, using the 21, 22