RedactedNarrative: On 12/14/16 at approximately 0520, the sailing vessel, "Agility" was on a southerly course making eight knots, near Thimble Shoals channel buoy #11, operator was operating the vessel from the cockpit helm station. He observed buoy #11, corrected his course to avoid it, then left the helm station to reel in the jib sail. The vessel was on a port tack, the sail shifted causing Operator to lose sight of the buoy. The vessel struck the buoy in the middle of the front cross beam and anchor. The vessel continued over top the buoy which scraped the bottom of the middle section of the catamaran then came up once the vessel had passed. Neither one of the two outer hulls of the catamaran were struck by the buoy.