With the completion of the three-step construction phase of the BeiDou Navigation Satellite System (BDS), achieving the overall goal of global service coverage, the system has significantly enhanced its role across a multitude of sectors. The BDS is not only pivotal in daily life and national defense but also extends its influence into emergency response, particularly maritime search and rescue (SAR) operations. As the utilization of BDS in SAR missions grows, so too does the sophistication of policies, regulations, and construction standards that govern its implementation.This article delves into the institutional improvements that have been made to integrate the BDS more effectively into maritime SAR services. It outlines the system’s architecture, emphasizing the robust infrastructure that supports its functionality. Moreover, it examines the current status of equipment used in conjunction with the BDS, highlighting advancements in technology that have bolstered operational capabilities.The unique features of the BDS short message service and Radio Determination Satellite Service (RDSS) functions are critical to its effectiveness. These components offer distinct advantages, such as strong autonomy and controllability, which ensure reliable operation even under adverse conditions. The system’s resistance to deception and interference enhances its reliability, while its two-way communication capabilities provide real-time data exchange between rescuers and those in distress. These advantages will provide a theoretical basis for the BDS to play a greater role in the development of maritime lifesaving systems in the future.