RedactedNarrative: The operator stated they arrived at the location where they were going to spearfish.  While one of the divers jumped in the water to observe the area, the operator noted that the stern of the vessel was sitting low in the water. The operator opened a rear compartment and noted there was a high volume of water within the hull. The operator then made the swimmer get back on board immediately and turned on the vessel. As the operator attempted to drain the water by picking up speed, the water level towards the stern raised.  Most of the vessels weight was located in the stern by dive gear and dive tanks making this the lowest point on the vessel were water was accumulating in high volume. The rising of the water level went above the level of the battery creating an electrical power shortage.  As a result of power loss to the vessel, the bilge pump could not pump out the water. As time passed, the occupants attempted to remove the water from the boat with a bucket.  Due to the tidal waves the amount of water entering the vessel was greater than the occupants could take out. Occupants realized the vessel was going to sink and evacuated the boat.  Eventually the entire hall was consumed in water due to the bilge pump not working and as a result the vessel capsized.