RedactedNarrative: Operator was starting to two a tube with two people on board. The transom broke when Operator began to pull the tube causing the vessel to fill with water. Subject was notified of the vessel by Reno County dispatch because they had received a call about a vessel that was half way sunk. When Subject arrived onlookers had pulled the vessel to shore. Operator was at a different location trying to get help to get the boat out of the water. Operator stated he did not believe any items of value were lost.