A week-long joint Indo- French exercise 'Varuna' with the participation of Indian and French naval ships and aircraft will be conducted in Goan waters from January 7 to 14. According to official sources, the Indian Navy will be represented by the aircraft carrier Viraat, Frigates Godavari and Ganga and the submarine Shalki. The French Navy will be represented by the aircraft carrier Charles de Gaulle, destroyers Forbin and Tourville, the tanker Meuse and submarine Amethyste