. "64.15" . "SM U-20 (Germany)" . . "SM U-20 (Germany)" . "boat Hesperian" . "U-20" . . . "28.5208" . . "1911-11-07" . "submarine" . . "''U-20''" . . . . "German submarine ''U-20''" . "7.3" . . "6.5E8" . "SM ''U-20''" . . . . . "U-boat" . "U-boat U-20" . "6.1" . "Grounded 4 November 1916 and destroyed by her crew the next day." . "8.37E8" . . . . . "1910-11-25" . "1913-08-05" . . "SM U-20" . "1912-12-18" .