Prime Minister Narendra Modi on Friday unveiled the new Naval Ensign 'Nishaan' at Cochin Shipyard Limited here in Kochi, doing away with the colonial past and befitting the rich Indian maritime heritage. The Prime Minister unveiled the new Naval Ensign 'Nishaan' during the commissioning of the indigenous aircraft carrier INS Vikrant. Naval Ensigns are flags that naval ships or formations bear to denote nationality. The current Indian Naval Ensign consists of a St. George's Cross -- a red cross with white background.