. "Formidable-class frigate" . . . "''Formidable''-class frigates" . "''Formidable''-class frigate" . . "Formidable-class frigate" . "RSS ''Tenacious''" . "RSS ''Supreme''" . "Formidable" . . "16.3" . "50.004" . . . . "RSS Tenacious" . "''Formidable''-class" . "3.2E9" . "114.8" . . . . . .