RNLI: every sailor, at sea or inshore, should support it!
Nobody expects it, but more sailors than you'd think sail into dire straits. RNLI is a volunteer institution, financed by donations, which saves their lives if it somehow can.
Please look through it's site, from this link: http://www.rnli.org.uk/who_we_are/rnli_people/volunteer_zone, and think about how YOU can volunteer. If you do, you'll be amongst a lot of Dutch and French sailors doing the same.