Regional Tsunami Service Provider. IOTWS Centre that provides timely earthquake information, tsunami forecasts, and other information to the Indian Ocean NTWCs. An RTSP may also serve a dual role as the NTWC for the country in which it operates.Threat-based assessment information is shared with NTWCs through secure communication methods and NTWCs report back the status of national tsunami warnings to the RTSPs. As of November 2012, authorized IOTWS RTSPs are Australia, India, and Indonesia.