Develop a proof-of-concept by 2040 – a crewed deep-space suborbital capsule shaped like a submarine hull, launched on an international rocket. If you meant something else (e.g., a movie script, a game mod, or a misheard term), let me know and I’ll rewrite the report accordingly.
It sounds like you’re asking for a on a concept called "Interstellar Indo Sub." interstellar indo sub