During the operations against Pakistan in December, 1971, Squadron Leader Kalyan Kumar Dutta, as Navigations Leader of a Bomber Squadron played a key role in the successful performance of the Squadron. The entire missions and the route missions for the squadron were meticulously carried out by him. In addition, as Navigator to his Squadron Commander he undertook the most difficult and dangerous missions himself with exemplary keenness and courage. On a special mission to an airfield by night, he executed some of the best and most accurate navigation at extremely low attitude of 100 to 200 feet above the hilly terrain resulting in a successful first run attack over the runway.
Throughout, Squadron Leader Kalyan Kumar Dutta displayed gallantry, professional skill and leadership of a high order.