Hello aspirant,
I hope you're doing well as for your query,

- I think it is conducted twice in a year, first during june - july and the other nearly to december.

-  Indian Navy has started computer based exams now.

- Visit the official website to know more : Indian Navy  (https://www.joinindiannavy.gov.in/en/page/ssr.html) .

I hope it helps

Have a nice day.

The exam is conducted twice a year, once in spring and once in autumn, approx 1750 candidates will be called for the written examination and Physical Fitness Test (PFT).

It consists of written examination conducted by the UPSC followed by conduct of the SSB.

For further information you can check the link below

https://www.google.com/amp/s/www.careers360.com/careers/articles/how-to-join-indian-navy-after-12th-counar/amp

Hope it helped you