Passenger had just changed positions with victim for victim to be the Operator since he had more experience.  Operator was at the helm standing with passenger at the right rear corner  At that time a large wave caused the pontoon to lift and rock hard enough to eject both over board.  Neither subjecs were wearing PFDs.  Operator never surfaced until retrieved by Lenawee County Sheriff and Addison Dive Teams.
Woodstock Township            