IMUCET

If your basic concepts of class 12th subjects are clear then it is enough for IMUCET exam, but you should score above 50 marks in English, according to the eligibility criteria of this exam, or if you want to know more about how to prepare for this exam or how to manage time for this exam then you can join a coaching institute.

Yes, you will be able to give the IMUCET exam. You are eligible for IMUCET exam.

B.Sc in nautical Science is a good option, as he can go in marine field as well as he will be able to sit in any competitive exam of graduation level.

HI Kumar Sake,
Anybody who is eligible to sit in the exam can get qualified in IMUCET. The exam is not too difficult if you have done the necessary preparations. Check the link below for more information on IMUCET and follow the instructions and guidelines:
https://www.shiksha.com/university/indian-maritime-university-chennai/exams/imucet/syllabus.

For entry in Maritime University they have their own exam called IMUCET. The application for the exam goes out in month of May and the exam is conducted in the early June.

You need to get a rank of 1000 minimum so that you will get in a good campus.
All the best.

It is different for everyone. Some may score more some may scoreless. So, it is just you need to show your own interest.

Following are the cut-off ranks:
GEN (688).
OBC (1977).
SC (4290).
ST (9327).

The NCERT books in PCM for class 11th and class 12th are enough.

Well, if you read and practice NCERT, then it is enough for a good marks.