Guess I haven't done this for a while. Installed a float under the dock at the cabin. It is 6' x 2' x 1' and that is a lot for one person to try to get under the water. I did manage to do it, but with the last push the float slammed up against the bottom of the dock and I nearly lost part of a finger. It was a bloody mess. Perhaps I'll listen to that voice in my head telling me to be careful from now on.