The GMDSS is an internationally recognized distress and radio communication safety system that has been in place for several decades. The GMDSS is an automated ship-to-shore and ship-to-ship system using satellites and/or terrestrial radio systems with digital selective calling technology.

These systems provide safety-of-life information and communication systems that inform vessels of navigation hazards and weather conditions, and enable distress calls with pertinent location and identification information with the push of a button.