New Delhi: President Pranab Mukherjee on Thursday congratulated the Indian Space Research Organization (ISRO) on the launch of India's seventh and final in the series of navigation satellites. In a message to ISRO Chairman A.S. Kiran Kumar, the president said: "I extend my hearty congratulations to you and your entire team on the successful launch." It "is an important landmark in our space programme, with India now joining the small group of nations having their own regional satellite navigation system. "It demonstrates, yet again, India's growing capabilities in space launch technology. The nation is proud of this achievement," the president said. The PSLV-C33 carrying IRNSS-1G, India’s final in the series of navigation satellites of the Indian Regional Navigation Satellite System (IRNSS), was launched from Sriharikota.