http://www.newindianexpress.com/nation/2019/oct/10/fishermen-in-deepsea-to-get-disaster-warnings-via-mobile-app-2045500.html

At present, disaster warnings are limited to 10-12 km (typical ranges of mobile phones and VHF) off the coast but it was difficult to reach fishermen who they beyond 50 nautical miles.
For seamless and effective dissemination of emergency information on disaster warnings to fishermen, the Centre Wednesday launched a mobile app that would provide warnings to fishermen who go for deep-sea fishing three days in advance.