Hello!Raju

I am listing some good colleges of tamil nadu for pursuing Btech with marine engineering :

1.Vel's Institute of Science Techology and Advance Studies ,Chennai

Exam Accepted:TNEA

2.Sri Venkatesawra College of engineering,Sriprembudur

Exam Accepted:TNEA,TANCET

3.SAMS College of engineering 

Exam Accepted :TNEA

4.Indian Maritime University, Chennai

5.IIT Madras

Exam accepted:JEE Advance

These are some colleges for marine engineering.

You can ask if you have any other queries.

GOOD LUCK!