P4M Mercator thejivebombers Naval Aviation Post-war February 5, 2018April 20, 2020 1 Minute Martin Aircraft had a post-war string of bad luck that included the Mercator. Though a capable aircraft, it lost out to Lockheed’s more versatile (and less expensive) P2V Neptune. The Mercator did enter service, but only 21 were built. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published February 5, 2018April 20, 2020