Is my Garmin broken?
I think I may be losing my mind. I have fished around a ledge a couple of times. I was there early in the season, and the ledge was exposed and above water from the red bouy to lighthouse. I was there last night at high tide. The ledge was submerged, and I was able to go over it. My sounder said it was 20 feet deep????? The tide doesn't change 20 feet does it? Am I crazy or is my sounder not working?