Hello aspirant,

there are many courses which can be done after completion of  BTECH in naval architecture. some of them would be

Master of Engineering in Naval Architecture and Marine Engineering . Specializing Master in Yacht Design.

Master in Marine Technology (M-TECH) ...

Master of Science in Yacht design. ...

Master in Naval Architecture . ...

Master's degree in naval and oceanic engineering.

MSc/PgDip in Ship & Offshore Structures.

Fresh naval architects  usually find it difficult to find good paying jobs now. If you're looking forward to pave a path for getting into MMD in a decade would be better. there are many government jobs available for it.

Hope this helps

Thankyou

good luck for everything ahead.