RedactedNarrative: Vessel 1 was travelling on plane, at night, out of Gypsum Reefs on the Arizona side of Lake Mead, east of Bonelli Bay at aproximately 30 mph. The operator reported that he struck a rock on his port side causing scratches and minor damages to the hull of the boat. The vessel also struck a submerged rock with the lower unit which caused the engine to break free and hang by the steering controls. No one was injured.