Ahhhhhh. Thanks Cobwebs. I never knew they had such a limited life. So if you don’t see a rescue within 48 hours, you’re “on your own”

ray:
Pete
On ya own....Nah not really.
The units send your position (Latitude and Longitude) details and the units ID for personal and or Vessel details.
That can be matched to a TR ( trip report) that has been recorded and updated as time goes by. Who and where your off to course and Est arrival stuff. Not that unusual for the units to transmit 90 hrs.
They are picked up by Satellite ( within minutes not hours ) and used by the appropriate RCC (Rescue Coordination Center).
Recorded positions are useful for projecting a probable position and directing the recovery team or vessel to an estimated RV area to locate the troubled vessel. Wind and tidal drift mostly.
If and when the EPIRB fails then you can activate your personal EPIRB (usually attached to your personal flotation device ), then after that a stand alone flashing strobe is effective, and flares.
This equipment is Compulsory on all Ocean Going Vessels and quite a few pleasure craft.
Doesn't t matter if the Vessel has a Catastrophic failure, as this stuff it stand alone.
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Tickets held personally include - Day Skipper, Boat master Cert, Maritime Coastal Skippers Ticket (now expired but could be renewed). Aircraft Observer , Search Coordinators Cert - Land and Maritime.
Add in 40 continuous years of S.A.R. ( Search and Rescue) Service. Land and Sea.
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Sitting on the porch......I guess thats true now as I do from time to time.
But no mention of the above equipment in any of the news articles that I have seen and listened to.
Lucky Bloke indeed.