0718 GMT February 25, 2020
Key to the breakthrough is GEMINI, a simple handheld device which collects data from the GPS-aided geo-augmented navigation (GAGAN) system used at Indian airports and transmits it to mobile phones via an app. GEMINI is an acronym for GAGAN Enabled Mariner’s Instrument for Navigation and Information, qz.com reported.
So far, communication with fishermen has been limited to mobile networks and very high frequency (VHF) radio which does not range over 20 kilometers, while fish shoals in the Arabian Sea, Bay of Bengal and the Indian Ocean are as far away as 150 kilometers from the coast. At such distances, it becomes impossible to provide timely warnings of sea storms and cyclones to fishermen.
“If only we had this device when Cyclone Ockhi hit the western coast in November 2017, we could have saved the lives of hundreds of fishermen lost at sea,” said India’s Minister for Science and Technology Harsh Vardhan when he officially launched GEMINI on October 9. Officially, Ockhi claimed 245 lives — 218 in India and 27 in Sri Lanka.
The device is the result of a collaboration between Indian National Centre for Ocean Information Services (INCOIS) and the Airport Authority of India which has been operating the GAGAN system at its airports since February 2014 using several geosynchronous communication satellites designed and launched by the Indian Space Research Organization.
Apart from providing storm and disaster warnings or Ocean States Forecast, the system also transmits locations of fish shoals by mapping Potential Fishing Zones to help enhance the livelihoods of fishermen, according to Satheesh Shenoi, director of INCOIS.
“GEMINI is manufactured in Bangalore by a local company and although it is cheap it covers the seas around India and can be sold for use by countries in the entire Indian Ocean rim,” said Balakrishnan Nair, a scientist with INCOIS.
According to Nair, the system detects potential fishing zones by using the same parameters as other satellites (such as sea-surface temperature and chlorophyll content) to provide forecasts three days in advance. He says an estimated 900,000 Indian fishermen and others from the Maldives, Sri Lanka and other states around the Indian Ocean will benefit from both the Potential Fishing Zones and the Ocean States Forecast services.
India’s autonomous regional satellite navigation system, called NAVIC, provides accurate real-time positioning and timing services. Navigation satellite systems currently in operation include GPS, operated by the US and Russia’s space-based satellite navigation system GLONASS. China’s BeiDou Navigation Satellite System and the European Union’s Galileo are expected to be fully operational by 2020.
INCOIS computers located in Hyderabad process signals received from GAGAN regarding the weather conditions and put these signals in numerical models based on the physics of the atmosphere and ocean phenomena. The computers then make the weather predictions and convey them to fishermen over GEMINI and via Bluetooth to mobile phones in nine local languages.
“This is the best system developed so far in terms of effectiveness and affordability, especially if supported by the fisheries department,” said John Swamy, a maritime safety consultant and a former officer in India’s merchant navy. “It does have the drawback that communication is only one way.”
Swamy has been lobbying for the use of satellite phones, currently banned for general use in India because of security reasons.
“With satellite phones, anyone can voice-call a fisherman anywhere and ask him to get back home when there is impending peril.”
“VHF radio systems, which have been in use for a long time, depend on line of sight and cannot transmit beyond the horizon which is around five kilometers — besides, there are protocols for their use and can get crowded in by too many users at [a] given time,” said Swamy.
“As for mobile phones, the reliable limit is less than 20 kilometers,” he said.
“The best part of GEMINI is that the information is available in several Indian languages and can be used by any fisherman in a small launch as long as he has a mobile phone with sufficient battery power,” Swamy said.