I, too, have experienced the low water – wind tide conditions described by Captain Tom below. As he notes, these depths usually persist only a few days, but while they are underway, soundings can be spooky!
If you are near or in the Florida Panhandle this morning, you will find the water levels are 1-2 feet below the charted depths. The north winds have been blowing hard for a few days and pushed the water off the coastline. It will come back in a few days; but for now, be careful.