Over 27 ships, dozens of helicopters, at least six fixed-wing aircraft and over 5000 personnel of the navy were deployed in relief operations.[65] These included Operation Madad in Andhra Pradesh and Tamil Nadu, Operation Sea Waves in the Andaman and Nicobar Islands, Operation Castor in Maldives, Operation Rainbow in Sri Lanka and Operation Gambhir in Indonesia.[66] Gambhir, carried out following the 2004 Indian Ocean tsunami, was one of the largest and fastest force mobilisations that the Indian Navy has undertaken.