USS Hancock CVA-19, on patrol at Yankee Station in the Gulf of Tonkin, during the Vietnam War, approaches port side of USS Mattaponi AO-41 Oiler for refueling. Fuel line from USS Mattaponi AO-41 Oiler to USS Hancock CV-19. Men wear life jackets on the ship. Crew of second division handles lines. One man of second division holds the line during refueling. A man high lined from USS Mattaponi AO-41 Oiler to USS Hancock CV-19 during refueling. He reaches the Sponson deck.