RedactedNarrative: On 06/08/2017 while patrol within Glen Canyon NRA I was notified by park dispatch that a party involved in a vessel accident on 06/07/2017 was interested in filing a report. When contacted via cell phone, OPERATOR1 stated in substance, he and his son were on a rented jet ski heading into gunsight bay when they encountered a large wake. OPERATOR1 altered his course, performing a 90 degree turn to his left hand side and was struck by another jet ski. OPERATOR2's jet ski sustained severe deep gouges into the fiberglass hull. As a result of the collision, the passenger of OPERATOR1's jet ski received a small laceration to his knee. OPERATOR1 transported his passenger to page ER where the passenger received several stitches and was released shortly afteoperator1 and OPERATOR2 are part of the same party. I spoke with both operator1 and OPERATOR2 on the phone, both denied needing any further medical attention.