So I did manage to mess up leaving our new marina. Some how I got out of the channel big time and the depth went all they way to 4' before I managed to get turned around and back out to deeper waters. This seems really odd to me as I never felt like we actually hit anything or stopped. Just to establish the conditions of our sailing area, Lake Guntersville is a fresh water, flooded lake, by damns on the Tennessee River, so the bed is mud and grass. I had the throttle down low and we maintained a slow 2+ knots during this self inflicted terror episode. My helm control was good and I never felt any resistance at all and was able to perform a very tight 180 turn and beeline back out the way we came in till I was back with a non alarming depth of 6+ feet. I'll dive on the boat bottom when the actual water temp warms up, probably in a month, and I really don't expect to see any issues.
I think I understand why I had the clearance and didn't actually run aground which is because the depth transducer in front of the keel is already below the waterline. The actually depth from that point is I'm guessing is less then 4' which is why we didn't run aground. This is of course a wing keel C310, pretty much stock and other then the new battery bank and Factory AC not really carrying any significant heavy cargo other then the 4 of us. I guess I'm looking for some feedback, is the actual depth from the transducer to the bottom of the wing keel 4' or is even shorter? I know there are differences in keel depths, which sure seems nutty to me.