RedactedNarrative: Unit 1 struck a dock post and the operator fell from the PWC.  The lanyard was not activated and the operator swam to the PWC.  Once at the PWC,  the operator made several attempts to climb back on but was unable.  The operator removed his PFD and attempted to board the PWC again.  The PWC was idling away from him and he went underwater.  A witness made a recovery and attempted CPR while EMS was en-route.  The operator was pronounced dead at the scene.