National Geographic : 1959 Jul
KODACHROMEBY JAMES F. CALVERT© NATIONALGEOGRAPHICSOCIETY Ice Drapes the Submarine's Stern. A Crewman Ropes Down the Side Except for a few minor dents in the sail, or conning tower, Skate escaped damage from her brushes with Arctic ice. "Security forbids disclosing the exact thickness that we penetrated," says the author, "because it is something other nations would like to know, something that cost us time and money to learn." Here, 220 miles from the North Pole, Seaman John Kirkpatrick inches down the sub's hull.