RedactedNarrative: Vessel 1 was in operation for approximately two hours when the operator noticed that Vessel 1 seemed to be slow to get up to speed.  As Vessel 1 continued through a no-wake zone, Vessel 1 began to list to port and the port pontoon began to fill with water.  The Occupants on board Vessel 1 shifted positions on Vessel 1 to try to counterbalance the vessel and the Operator began making way as fast as possible back to the marina.  A Good Samaritan saw Vessel 1 needing assistance and brought all Occupants from Vessel 1 aboard their vessel and towed Vessel 1 back to the marina.  Following the incident, inspection of Vessel 1 revealed that the support that connects the pontoon to the deck had pulled away, ripping a hole in the top of the chamber and allowing water to enter the pontoon over the course of the day.