Can I get admission in marine engineering course after passing B tech course in mechanical engineering ?

Yes you can get admission in marine engineering course after passing B tech course in mechanical engineering. here I am giving you information about required eligibility for M. Tech. Marine Engineering course ..

M. Tech. Marine Engineering Eligibility
You have to passed BE/B.Tech in relevant discipline with minimum 60% marks from a well recognized university .

Colleges for Marine engineering are :

The Indian Maritime University, Cochin campus, Kochi
The Marine Engineering and Research Institute (MERI), Hay Bunder Road, Mumbai,
The International Maritime Training Centre, Powai, Mumbai
Hindustan Institute of Maritime Training, Kalpakkam, Tamilnadu
Institute of Maritime Education and Research under the Anna University
AMET University, Kanathur, Chennai
The Marine Engineering Training Institute under the Cochin Shipyard Ltd
The Shipping Corporation of India Ltd, Mumbai
The Samudra Institute of Maritime Studies
Vels Academy of Maritime Education and Training, Chennai
CMC Maritime Academy
Coimbatore Marine College
GKM College of Engineering & Technology
International Maritime Institute
Maharashtra Academy of Naval Education & Training
Neotia Institute of Technology Management & Science
Padmabhushan Vasantdada Patil Pratisthan College of Engineering