Naval Air Factory (NAF) PN-7 and crew thejivebombers Naval Aviation Pre-war January 29, 2018April 20, 2020 1 Minute May 1924. An open cockpit flying boat, NAF’s PN series of aircraft were widely used by the navy in the 1920’s. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published January 29, 2018April 20, 2020