RedactedNarrative: The vessel was entering Wiggins Pass from the Gulf of Mexico passing day markers two and three. As the Operator passed the above markers, the depth went from 6 feet to 1.9 feet in depth causing the vessel to hit bottom. 
  
  Immediately the vessel was put in reverse to back out from the potential grounding situation. In doing so, the out drives struck an object under the water causing a failure in the out drive. The starboard drive was knocked loose from the hull thus allowing water to enter the engine compartment. 
  
  Subsequently with the water intrusion, both engines eventually lost power along with all electrical systems. The bilge pumps ceased working and eventually the vessel's hull filled with water causing it to sink Since the boat is still partially submerged, I have not had an opportunity to personally inspect the drives but was informed by a sea-tow diver that this is what he observed below the water, Should there be any discrepancies once the vessel is raised, I will submit a supplemental report indicating my findings. 
  
  The pass has filled in drastically in the last 6 months and has become a hazard to navigation for many vessels entering and leaving the pass. Due to lack of this knowledge and area familiarization, the operator was not aware of the pass filling in with sediment causing shallow depths.