Hey,

The IMU STANDS FOR INDIAN MARITIME University. It conducts it's own common entrance exam and in order to take admission one needs to sit for the entrance.

Now as far as the eligibility is concerned they require students that they needs to have physics chemistry and maths in their class 12th.

If you will complete your maths from NIOS then I think you are good to go .

Below I have mentioned the link that contains detailed eligibility information about the exam.

https://www.google.com/amp/s/engineering.careers360.com/articles/imu-cet/amp

Hope that helps.

Thank you