Using LNG to fuel ships allows a significant reduction in CO2 as well as of other forms of pollution compared with conventional shipping fuel.

"Port will offer 50% discount on Port Dues, Pilotage and Berth hire charges," the notice to shippers, issued by Adani Ports and SEZ Ltd, said.

The company, controlled by billionaire Gautam Adani, said the waiver scheme will apply to vessels with dual fuel engines that use LNG as a primary fuel. The scheme will be valid for six months from Aug. 1.

However, the waiver on port charges would not apply for vessels carrying LNG cargo and using LNG fuel, it said.

Adani Ports and SEZ Ltd were not immediately available for comment.

(Reporting by Nidhi Verma; editing by Barbara Lewis)