Hi!

Yes, it is necessary for the student to pass 12th board exams in first attempt if s/he is willing to join Samundra Institute of Maritime Studies (SIMS), Mumbai for Diploma in Natural Sciences or any other programme. If you want to know more about it in detail you can check the prospectus provided on their official website as "SIMS Prospectus 2019.pdf". I hope this will be helpful.