RedactedNarrative: Vessel 1 was operating at a cruising speed on plane. Occupant 3 was kneeling facing forward on a small seat, with only his knees making contact with the vessel.  As the operator decelerated Occupant 3 fell forward off the bow of the vessel and into the water. Operator 1 made an evasive maneuver swerving to the left to avoid striking occupant 3. Occupant 3 was struck by the propeller of vessel 1 in his left arm.