Quote Originally Posted by CAPP View Post
Is there anything special to do,what do you buy? THANKS
Buy a GPS puck like below, you may can find a 16 channel for around $100.00 Try Humminbirds web site or Cabelas.

AS GR50Accessories.GPS Receiver

The Humminbird 50-Channel GPS/WAAS receiver gives you lightning fast position fixes accurate within 2.5 meters. This receiver can be used in lower signal areas (compared to a AS GR16) and still maintain a position fix. It also has a faster Time to First Fix (TTFF). The receiver's dimensions are: 3.25" diameter, 1.5" high and comes with 20 feet of cable and has a 1"-14 thread count stem mountable with optional antenna stem (antenna stem not included).

Check list below of compatiable products

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MSRP $149.99