UK & Ireland (yes, the Republic) have the RNLI - Royal National Lifeboat Institution. [ rnli.org ]
See BBC series “Saving Lives at Sea”
e.g. https://youtu.be/VWFgK8zegWk
The NORDIC DONNA arriving in the port of Den Helder.
Photo: Wim Albers (c)
Presently operated by Glomar Offshore as a guardboat in the Dutch sector of the North Sea.
Built as RS 81 “Hjelm Waage” at Smedvik Shipyard in 1971.
Here is an article from Skipsrevyen from her delivery in 1971:
She served Redningsselskapet (NSSR) from 1971 - 2004, both station at various locations along the Norwegian coast and Shetland.
PS: She has had various owners and tasks since then.
Here she is in her later years with NSSR, doing what she did best for 33 years:
In North America the US Coast Guard has an volunteer auxiliary that generally doesn’t do much SAR (with a few exceptions) but there’s definitely parts of Canada that have volunteers routinely performing SAR as part of the Canadian Coast Guard Auxiliary.