"N class" . . "N" . "''N''-class" . . . . "United States N-class submarine" . "4.2672" . "N-class" . . "a class" . . . . . . "44.8056" . "3.6576" . "United States N-class submarine" . . . . "24.076" . "N-class submarines" . . . . . "N-boats" . . . . "4.572" . . .