RedactedNarrative: V1 exited Big Carlos Pass in Fort Myers Beach, FL. The vessel exited the channel, Operator turned off the vessel and left it adrift, all occupants jumped into the water to swim. The depth in this location was between 4.7 feet and 6.7 feet at the time of the accident. Operator did a backwards dive off the stern of V1, straight down into the water, striking the bottom.  His spinal cord was severed, causing death nearly instantly.