I disagree. He put the lives of all men on that ship and other ships at risk, knowingly. String the %&%^%& up.
Keelhauling is the act of mounting a pulley on a yard arm. A rope is passed over the side of a ship, under the keel and up the other side, through the pulley. It is then afixed to a man's hands. The other end is afixed to his feet. He is then pulled back and forth against the hull of the ship under the waterline.
I think this qualifies as being strung up.