In doing further research, I find your father arriving in New York City as a member of the Armed Guard crew aboard the S.S. JOHN GORRIE on August 7, 1943, arriving from Liverpool, and again on December 4, 1943, from Belfast, Northern Ireland.
I can forward to you the names of the rest of the Armed Guard crews aboard the JOHN GORRIE for these two voyages if you like. On both voyages the crews were commanded by Lt (j.g.) H. Gifford Irion. I don't know whether any of his shipmates are still living or, if so, how to contact them, but the names may stir some memories for your father.
Ron Carlson, Webmaster
Armed Guard website www.armed-guard.com