I used my new 797 on Tuesday for the first time and had the same problem that others have talked about with the GPS side of Hummingbird. I had all my waypoints loaded on the 797 and it would either be way off or would reception all together.

Thankfully I read on this forum not to trust the Hummingbird GPS and had my Garmin 378 that I have used for three years and has never stirred me the wrong way.

LOL