RedactedNarrative: Operator of vessel 1 left the vessel voluntarily to swim.  The vessel and swimmer separated due to wind conditions.  Occupants left on vessel 1 could not operate the vessel.  Occupants deployed a Type IV PFD but it did not reach the swimmer.  Swimmer submerged and never surfaced again.
NameOfBodyOfWater: Lake Mead
NearestCityTown: Boulder City                  