Bad Dog I hit the same lump when I went out. It is about 15' from the SYC side, a little less than halfway alongside SYC. I had slowed to 4 knots and even though it was low tide, I just nudged it and kept going. I draw 7' 2" and I believe that the channel may be almost a foot deeper by the old Coast Guard station due to scouring during Katrina except for this bump. I think it will take a diver to find the exact detail of what is there.