Hello siddhi,

I am mentioning below the top merchant navy institutes in maharashtra~

•Maharashtra Academy of Naval education & training.

•BP Marine academy, panvel Campus, Raigad.

•AIMS Institute of Maritime studies, Babu Mumbai. 

•Samundra Institute of Maritime studies.

Hope this was helpful. If you have any queries unanswered, feel free to drop a comment below.

All the best!