The correct answer is B) NAVTEX. NAVTEX is the primary equipment for receiving Maritime Safety Information (MSI), which includes navigational and meteorological warnings, forecasts, and other urgent marine safety information. NAVTEX is a specialized receiver that automatically prints out this critical information, making it an essential tool for mariners to stay informed and safe while at sea. The other options are incorrect because: A) EPIRB is an emergency position-indicating radio beacon used to alert rescue services in the event of a distress situation, C) SART is a radar transponder used to aid in the location of survival craft, and D) INMARSAT-B is a satellite communication system that provides voice and data services, but is not the primary means of receiving MSI.