Just because a chart says nothing is there doesn't mean there is nothing there and this is a case in point. Sarasota Bay in general is devoid of features. Sonar images shows largely a flat plane punctuated by the occasional rough bottom of fish havens where construction rubble has been spread around. The center of the bay bottoms out at 12' and the charts say this is the deepest location, but its not. There is a large hole in the bay hiding in plain sight and I'm using Garmin's Quickdraw software to map it out along with some other good uses for this clever software
