What is the basic concept of GMDSS?

The Global Maritime Distress and Safety System (GMDSS) is designed to enhance the safety of life at sea and improve the efficiency of search and rescue operations. It encompasses various communication technologies and protocols that facilitate distress signaling and the coordination of responses between ships and shore authorities.

The fundamental principle of GMDSS is that it implements a network of communication systems to ensure that when a maritime distress situation arises, assistance can be rapidly organized and provided. This includes enabling shoreside authorities and vessels to work together effectively during search and rescue (SAR) operations, ensuring the swift notification of search and rescue authorities when a distress situation is identified, and ensuring that vessels in the immediate vicinity of the distress are alerted to provide timely assistance.

Considering this, the option stating that "All of these" is the correct answer because it encompasses all the integral components of GMDSS: coordination among various entities, alerting SAR authorities, and notifying nearby ships of a distress situation. Each of these elements is crucial in creating a comprehensive and effective distress response system, highlighting the GMDSS's role in maritime safety and communication.