My Lowrance GPS/Sonar unit also decided that the Catawba Island launch ramp was a good spot to crap out.I too know the Western Basin well so we headed out to the cans and set our lines.Then after we had caught a couple of fish it decided to end its strike and turn on.Didn't really need the sonar but the GPS was nice to keep hitting the same lines as before.Mine is a 8 year old unit and I think it might be time to hit Cabelas for a new one.