. "1.534e+09"^^ . "7.54"^^ . "83.5"^^ . "9.46"^^ . "31.484"^^ . "SM U-138 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-138 was engaged in the naval warfare and took part in the First Battle of the Atlantic."@en . "1917-01-12Z"^^ . . "4.85"^^ . . "1918-03-26Z"^^ . "U-138"@en . "1.175e+09"^^ . . "1916-05-27Z"^^ . .