Stargazer2006 said:The U.S. Navy also showed interest in the PA-59, and evaluated a float version of it, PA-59N Seageep. They simply designated it the "PA-59". This is one version I'd love to find more pictures of. Please note that this is simply the Army's 58-5510 with the mention "Army-Navy" added on the sides.
and may be Piasecki submitted those concepts.