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GMDSS
Primary Mission Areas:
Services & Reporting:
Maritime Information:
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM

Effective 01 August, 2013, the U. S. Coast Guard terminated its radio guard of the international voice distress, safety and calling frequency 2182 kHz and the international digital selective calling (DSC) distress and safety frequency 2187.5 kHz. Additionally, marine information and weather broadcasts transmitted on 2670 kHz will terminate concurrently. See the safety alert. Note that these frequencies are still available and in use, notwithstanding the Coast Guard's termination of the radio guard. Please contact us if you have any questions.


In 1979, a group of experts drafted the International Convention on Maritime Search and Rescue, which called for the development of a global search and rescue plan.  This group also passed a resolution calling for the development of a Global Maritime Distress and Safety System (GMDSS) to provide the communication support needed to implement the global search and rescue plan.  

This system, which the world's maritime nations - including the United States - have implemented, is based upon a combination of satellite and terrestrial radio services and has changed international distress communications from being primarily ship-to-ship-based to primarily ship-to-shore-based (Rescue Coordination Center).  

For more information, visit the International Maritime Organization (IMO) Global Maritime and Distress Safety Systems Overview and/or download a GMDSS Inspection Checklist.