RedactedNarrative: Operator of vessel (V1) was engaging in tubing, utilizing a 3-person float. V1 was heading in a Southerly direction. When the operator turned Southeasterly the tube slid to STBD. As the tube slid to STBD it did strike a bulkhead causing all three persons on the float to be ejected. The victim who was seated on the float of the tube struck the bulkhead as she was ejected which caused a fatal head injury. The victim was transported to South Nassau Hospital where she was pronounced at 1843 hours. No injuries were sustained to the other two persons on the float. V1 was towed from scene to Nassau County Marine Bureau for further investigation. Operator of V1 was PBT'd resulting in a BAC of .00.