Explanation: The Global Maritime Distress and Safety System (GMDSS) fundamentally utilizes a sophisticated network of automated systems and satellite technology to significantly enhance emergency communications for the safety of life at sea. Its primary goal is to ensure that a vessel in distress can promptly and reliably send an alert to shore-based search and rescue authorities and other vessels, regardless of its global position. This comprehensive system integrates satellite services (such as Inmarsat and Cospas-Sarsat) with terrestrial radio technologies (like Digital Selective Calling - DSC on VHF, MF, and HF) to facilitate rapid distress alerting, efficient search and rescue coordination, and the delivery of vital maritime safety information. Option B is incorrect because while Digital Selective Calling (DSC) is a crucial automated component of GMDSS, the system itself is far broader than just improving DSC procedures; it's a global, integrated safety communication system. Option C is incorrect as GMDSS's primary function is maritime safety and distress communication, not providing lower-cost commercial communications. Option D is incorrect because GMDSS is not a collision avoidance system; that role is served by technologies like radar and AIS.