RedactedNarrative: THE PRIMARY CAUSE OF THIS CRASH WAS DUE TO OPERATORS INEXPERIENCE OPERATING VESSEL 1 AT A SLOW SPEED IN VERY LARGE WAKES, TURNING VESSEL 1, SO THE WAKES STRUCK THE STERN INSTEAD OF THE BOW OF VESSEL 1.  THE OTHER CONTRIBUTING FACTOR WAS THE LARGE WAKES ROLLING INTO THE COVE.  The boat took on water and sank.