Hii,do not worry i will help you according to your query.There are only few colleges providing Naval Architecture degree in India. . Anyway coming back to your question following Colleges may be termed best considering the quality of teaching faculties, Infrastructure and experience.Here is the list of some college:

-Indian Institute of Technology, Kharagpur

-Indian Institute of Technology, Madras

-Cochin Institute of Science and Technology, Kochi

-Andhra University, Visakhapatnam

-AMET, Chennai

-ISBT, Goa

-IIT-kgp

-IIT-m

-CUSAT - Dept. of Ship Technology

-Indian Maritime University - Visakhapatnam

-Andhra engineering university

-SNGCE

-AMET

-Indian Maritime University, Visakhapatnam

-Hind Institute

Hope,this information will helpful for you.Goodluck for your future.