RedactedNarrative: V-1 was traveling southeast from Cinco Bayou in Choctawhatchee Bay at approximately 15 mph. The structural integrity of the transom had been weakened due to the completely rotten wood within the transom. The force of the motor pushed the bottom of the engine mounting bracket through the transom while pulling the top of the transom down and rearward. Water entered the bilge causing V-1 to sink to the top of the gunwales. O-1 and two other occupants exited V-1 without injury. V-1 suffered total electrical system, engine, and structural damage due to exposure to saltwater.