RedactedNarrative: THE OPERATOR WAS DRIVING THE VESSEL BETWEEN THE RED/GREEN CHANNEL MARKERS IN 50 FT OF WATER, THEN SUDDENLY THE DEPTH CAME TO 12FT. THE OPERATOR TRIED TO PUT THE THROTLES IN NEUTRAL BUT FOUND HE WAS STUCK ON THE SEAWALL. NO INJURY, NO ALCOHOL THE MARINE DEPUTY STATED THAT THE VESSEL DROVE ONTO THE FIRECRACKER WALL WHICH IS 700 YARDS OF SEAWALL WHICH WAS UNDER ABOUT 1.5 FT OF WATER.