hello aspirant, 

students need have 60 percentage to eligible for b.sc nautical science and also to get admissions in to the colleges,  you need to qualify relevant entrance test followed by psychometric tests, medical examination and interviews.

minimum marks in the sense,  the eligibility criteria should be possesed for the admission and entry requirements.

candidates need to have 6/6 eye sight,and should not suffer from night blindness and physically fit. 

thank you