Of course, it's the fabled Flying Sub from the ABC-TV series VOYAGE TO THE BOTTOM OF THE SEA. Who knew Namor and Admiral Nelson had the same team of designers and engineers?
The other day, I re-read SUB-MARINER #16, published by Marvel Comics in August, 1969. I was thirteen-years-old when I read this for the first time. I enjoy going through my long boxes and re-visiting some of these old comic book friends. It's a real blast from the past and I get much more enjoyment out of a nearly 50 year old comic book than I do from much of what's currently published. The story, THE SEA THAT TIME FORGOT is a good one. It's by the team of Roy Thomas (my all-time favorite comic book writer), Marie Severin and Joe Gaudioso. Check out that Atlantean craft depicted in the left and middle panels above. Look familiar?