RedactedNarrative: Shortly after sunset on 05/07/2016 Lake Mead Rangers responded to a call for a visitor assist for a disabled vessel adrift on the Cottonwood Basin of Lake Mohave.  The vessel, a low freeboard, flat-bottomed boat, was reported to have 2-3 adults on board.  As Rangers approached the last known location of the vessel winds increased creating 3 foot swells, rain and hail combined with the lack of moonlight creating very poor visibility.  
  
  Rangers established ICS and increased the search urgency as they feared the vessel may have sunk and there may be people in the cold lake water.  Approximately 4 hours into the search, Rangers located the two males within the search zone; about two miles south of the point last seen.  
  
  Both were close to exhaustion and hypothermic but were wearing their PFDs and holding onto each other.  They were treated on scene and one was transported to a Las Vegas hospital for hypothermia.  
  
  During the subsequent investigation Rangers determined the vessel swamped and sank as the storm moved in shortly after the initial call.  During the search Katherine Landing and Cottonwood Rangers were assisted by an AZ Dept of Public Safety helicopter.