RedactedNarrative: At 6:03 pm, I began to interview Operator. According to Operator's statement, he was operating his PWC, (FL3955RG) in a easterly direction through the narrow mangrove lined cut known as the Whale Harbor Wheel Ditch, when he collided with, what he described as a branch. Operator has no recollection of what transpired immediately after the collision. He only remembers seeing his sister in the water bleeding and he swimming to her aid.; occupant suffused a large laceration to her head.; operator suffered a laceration to the right side of his head as well as a contusion to the right side of head.