Inmarsat-C SafetyNET is an internationally adopted, automated satellite system for promulgating weather forecasts and warnings, marine navigational warnings and other safety related information to all types of vessels and is part of the Global Maritime Distress and Safety System (GMDSS). There are no user fees associated with receiving SafetyNET broadcasts. National Weather Service SafetyNET broadcasts are performed under contract with VIZADA using the Inmarsat satellite system of geostationary satellites.
In other words we can understand safetyNET as:
SafetyNET is the International Service for the transmission and automatic reception of maritime safety information (MSI) and search and rescue (SAR) via the Inmarsat satellite system.
In the areas of the oceans where ships cannot receive terrestrial NAVTEX messages, ships can receive navigational warnings by satellite via the SafetyNET enhanced group calling service.
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