Addressing a gathering here on the occasion of a book launch, he said the navies of the two countries are also cooperative and have initiated a separate dialogue on maritime security and cooperation.
"In my view Sino-Indian maritime rivalry is not inevitable... Both India and China have a common interest in keeping the sea lines of communication through the Indian and western pacific oceans open. These lines are vital to Indian's trade and energy flows. So are they for China," he said.
"That is reality that has happened simultaneously on both sides of the Strait without apparent frictions. These are natural consequences of development of India and China. As we both globalise this will happen... I think these are natural consequences," he said.
The NSA cited their involvement in anti-piracy operations of the two navies in their increasing cooperation.
"The two navies are also cooperative, whether on anti-piracy off the Somali coast, the Gulf of Aden and other instances," he said.