RedactedNarrative: THE PRIMARY CAUSE OF THE CRASH IS O1 OPERATING TOO CLOSE TO THE LOW WATER DAM. SECONDARY CAUSES ARE INEXPERIENCE AND WATER CONDITIONS. VESSEL ONE GOT SUCKED INTO THE LOW WATER HYDRAULIC, SUBSQUENTLY CAPSIZING AND EJECTING BOTH THE OPERATOR AND PASSENGER. VESSEL ONE TUMBLED FOR SEVERAL HOURS IN THE HYDRAULIC SYSTEM AND WAS RECOVERED LATER WHEN THE WATER RECEDED.