Distressed sailors and struggling swimmers. If you are in trouble at sea - they will be there to help you.
And this summer Kent and Essex had the UK's busiest coastal RNLI lifeboat stations - at Southend on Sea and Ramsgate.
But with the worst summer on record for 100 years - why have call outs soared in some areas? Sarah Saunders has been finding out.
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Rain clearing east tonight for a dry but fresher day tomorrow with plenty of sunny spells.
Heavy rain clearing east for a dry but fresher day tomorrow with some hazy sunshine.
Rain becoming heavy at times this afternoon before clearing tonight. Dry with hazy sunshine tomorrow but feeling fresher.