Another cruiser shares his experience, and the advice of TowBoat US, concerning a troublesome stretch of shoaling waters.
I came through that area (Day Mark 110 at White Point) going south in April and hit there at low tide. I grounded where it says there should be 12 feet. I called Tow Boat US to see if they had and tricks about how to get through there. Their advice was to anchor, eat lunch, and wait until the tide came up!! Turned out to be excellent advice. When returning north in May, I made sure to pass through there at high tide and no problem.
Capt. Sykes DeHart