Yes, you can file RTI to Indian Maritime University (IMU).
Indian Maritime University (IMU) is a Central University established by the Parliament under Indian Maritime University Act 2008, on 14 November 2008. IMU is a "Public Authority" as per Section 2 (h) of the RTI Act. The University comes under the Ministry of Shipping
You can file RTI to the University either Online or by Registered Post by paying the prescribed fee.
To know about he procedure to file RTI Applications Online to Central Govt. Departments, please refer https://onlinerti.com