If the Nimitz is so close to the Chennai port they could map the underwater region using their sonars. In the event of a later conflict this will allow their submarines to find underground hiding places and holes and know exactly how to get deep into the port without avoiding our sonars. Chennai port is one of the most important commercial shipping areas. I dont know if I am right or wrong on this but I hope our Navy thought about this. If we think the Americans are not doing the mapping at this moment on their ship then we have to be really stupid. The only question is how will it be put to9 use.