RedactedNarrative: I was on patrol near buoy 107 on fully marked National Park Service Vessel 290. At approximately 1404 we received a call of a sinking vessel near buoy 106. We arrived at approximately 1412 and found a sinking ski boat being towed by a houseboat. 
  
  OPERATOR was in the water securing a line to the bow of the sinking boat. I told OPERATOR to swim to my vessel and get in. Once OPERATOR was in my vessel he told me they were towing the boat with the houseboat when it started to take on water. OPERATOR told me the waves were crashing over the ski boat and it started to sinking. The bow of the boat was under water up to the stern ski post.
  
  OPERATOR's bilge pump was operational. I secured the ski boat to my vessel and we were able to side tow it to the shore. By the time the ski boat got to shore the bilge pump had stopped working. There was water damage throughout the entire ski boat. OPERATOR told me his electric was not working and does not know if it could possibly be a dead battery. Aramark responded and pumped the vessel out and towed it to Bullfrog Main Ramp.
  