CHATHAM, Mass. - Retired Master Chief Petty Officer Mark "Mac" McKenney and David O'Connor, both former Coast Guardsmen aboard the Coast Guard Cutter Point Welcome, scatter former shipmate Chief Petty Officer Richard Patterson's ashes at sea from the deck of Coast Guard Cutter Tiger Shark about three miles off the coast of Chatham, Mass., Wednesday, June 16, 2010. Patterson was a legendary Coast Guardsman best remembered for his heroic courage under fire when the Cutter Point Welcome (WPB 82329) was attacked by friendly fire from U.S. Air Force aircraft near the demilitarized zone in South Vietnam on August 11, 1966. Patterson succumbed to cancer on April 12th, surrounded by family and friends. Coast Guard photo by Petty Officer 3rd Class Connie Terrell.