Leo White in the role as "Professor" is in studio records/casting call lists as a cast member, but he did not appear or was not identifiable in the movie.
The airship in the movie, the USS Macon, holds the world record (along with her twin sister USS Akron) for biggest helium filled airship.
The movie was filmed in the spring of 1934 on the U.S.S. Arizona, which was sunk on 7 December 1941 at Pearl Harbor.