RedactedNarrative: With the ranger in front the 2 units were returning from a tour and upon nearing the No Wake Zone at Barefoot the ranger then Unit 1 came to idle speed. Unit 2 did not realize that they were stopping and ran over Unit 1 just right of center from the stern of the vessel. Unit 1 operator was struck and knocked a considerable distance away. Operator 1was transported to Grandstand Regional Medical Center and admitted to SICU for for surgery. Injuries are laceration to spleen liver, and kidney. Broken left hip and 3 chipped vertebrae in the lower back.