RedactedNarrative: At 1831hrs AHM 1 and AHM 2 responded to the incident location on an accident involving a personal watercraft which struck a rock. Upon arrival they located the PWC and operator in the area West of Execution Rocks and North of Sands Point aboard a vessel which assisted him out of the water and called police. Operator claimed no injury and was brought aboard marine 3. He advised operating V1 between 20-25 mph when he struck a rock at the incident location, was thrown from his PWC into the water and V1 became partially submerged. Tow Boat US responded and towed V1 and the operator to City Island.