For the most recent list of available accessories for yourunit, current user manuals and software updates, visit ourweb site at www.garmin.com.ivPacking ListIntroduction Before installing and getting started with your unit, please check to see that your package includes thefollowing items. The package part number can be found on the outside of the box. If any parts are miss-ing, please contact your Garmin dealer immediately.Standard Package (010-00289-00 w/o transducer):• Fishfinder 320C Unit • Surface-Mount Bracket and Knobs • Power/Data Cable • Owner’s Manual• Self-Adhesive Quick Reference Guide • Protective Cover • Flush-Mount Hardware KitOptional Package (010-00289-01) includes Standard Package, plus:• Dual Frequency (200/50kHz, 10/40°) Plastic Transom Mount Transducer with Depth and Temp• Separate Speed SensorOptional Package (010-00289-02) includes Standard Package, plus:• Single Frequency (200kHz, 20°) Plastic Transom Mount Transducer with Depth and Temp• Separate Speed SensorOptional Accessories:• US A/C PC Adapter • EURO A/C PC Adapter • Cigarette Lighter Adapter • 2nd Mounting Station• 10 ft. Transducer Extension cable • 20 ft. Transducer Extension cable • Temperature probe• Speed sensor • Temp & Speed only sensor, plastic, thru-hull mountOptional Transducers:Included in the Optional Packages are transom mount transducers and separate speed sensors. Thesetransducers provides good all-around performance. For a list of optional transducers, see page v.)