Hey !
Though ocean engineering and naval architecture  are branches which are less opted by students, if students succeed in these fields the packages they grab  are very high.
IIT Kharagpur and IIT Madras are known for these branches. According to your query you can definitely go for it if you are interested and willing to study hard. Refer the below given link for more detailed information on ocean engineering and naval architecture.
https://engineering.careers360.com/articles/naval-architecture-and-ocean-engineering
Hope this helps
All the best !