RedactedNarrative: V1 was underway, just NE of the St Lucie Inlet, when it began to take on water (reason unknown) and subsequently sank (partially submerged) before being recovered by Tow Boat US. Per statements provided by Operator and vessel occupants, the vessel had gotten underway at approximately 0800, headed for Mariner Cay Marina. Per Operator, this was his first time running the vessel, following it's recent purchase. While underway, northeast of the St Lucie Inlet, vessel occupants alerted Operator that the vessel was taking on water from the stern and was pouring in over the transom. Noting that the hull was filling up, Operator then radioed his position to the US Coast Guard over channel 16. 
  
  All persons onboard the vessel placed Personal Floatation Devices on their bodies. Per operator the vessel continued taking on water and began to list to the port.  Once all vessel occupants were off the sinking vessel, they were assisted by a good Samaritan vessel and the Martin County Sheriff's Office Marine Unit, at which time all subjects were transported back to Sandsprit Boat Ramp. 
  
  Per Operator, the vessel did not strike any fixed objects or sustain any damage that had caused it to take on water in such a rapid fashion. Operator advised that prior to purchase, a vessel mechanic had inspected the vessel and deemed it sea-worthy. 
  
  The vessel was recovered by Tow Boat US, at which time it was held in their tow yard. Upon later inspecting the vessel, no there was no apparent damage to the hull of the vessel that would have compromised it's integrity. Causation of the vessel taking on water is unidentified at this time and is pending review by a marine mechanic.
  