V2 was following V1 on a PWC tour bay side of Duck Key.  V1 motioned to V2 that he was stopping and came to a stop.  While drifting, V1 was turned and facing the oncoming V2.  V2 did not stop, striking and overriding V1.  This caused crushing damage to the fiberglass cowling on the front of V1.  The steering column and starboard mirror of V1 were also damaged.  Both operators and the occupants of V2 were ejected.  All were wearing PFD's.  There were no injuries.
MARATHON                      