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

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.


These statistics from the USCG Atlantic Area RCC refer to the number of distress alert cases (e.g. ships sending the alert), not the number of alerts received.  The USCG routinely receives numerous distress alerts, especially DSC alerts, from the ship sending the alert as well as relays of that alert from other ships.  Those numerous extraneous alerts and relays are not included in the RCC statistics reported below.   The USCG is not collecting similar statistics from the Pacific Area.  

The documents below are Excel spreadsheets in Acrobat PDF format.  Information includes numbers of real and false alerts, alerts having invalid identities, invalid positions, and no position information.  Systems for which statistics are collected include MF/HF DSC, Inmarsat A, B, C, and E (EPIRB).  Statistics concerning COSPAS-SARSAT EPIRB alerts are collected by NOAA.   The AMVER Rescue Summary Experience provides statistics on actual distress alerts by means of alert, including both GMDSS and means, during the period 1996-1999, in both Atlantic and Pacific Areas. 

USCG Atlantic Area:

2003 2004 2005 2006 2007 2008 2009 2010 2011
Jan Jan Jan Jan Jan Jan Jan Jan Jan
Feb Feb Feb Feb Feb Feb Feb Feb Feb
Mar   Mar Mar Mar Mar Mar Mar Mar Mar
April April April April April April April April April
May May May May May May May May May
June June June June June June June June June
July July July July July July July July July
Aug Aug Aug Aug Aug Aug Aug Aug Aug
Sep Sep Sep Sep Sep Sep Sep Sep Sep
Oct Oct Oct Oct Oct Oct Oct Oct Oct
Nov Nov Nov Nov Nov Nov Nov Nov Nov
Dec Dec Dec Dec Dec Dec Dec Dec Dec

(Statistics from Jan 2000 - Dec 2002 have been relocated)

- GMDSS Statistics Totals 1996 - 2000 (Jan 01)

DSC Distress Statistics

GMDSS Statistics Total of the USCG Atlantic Area available above shows a significant reduction in the number and rate of false alerts during 2000.  The false alert rate for HF DSC was comparable to other GMDSS systems, including 406 MHz EPIRBs.  

USCG radio watchstanders and ship operators had been overwhelmed by the number of inappropriately transmitted all-ship DSC distress relays.  The USCG issued a notice to mariners in an attempt to reduce the numbers of relays.  The average number of relays for each distress message transmitted was subsequently reduced significantly.