In the land downunder we have SLSC ...SurfLifeSavingClubs.
Our population is mostly coastal dwelling and the hot summers draw people to the beaches to cool off.
Consequently,poor swimmers or non swimmers can get into difficulties and the clubs mark out the designated areas between 2 flags and they observe those areas and attempt to rescue anyone who looks to be in trouble.
Interclub contests, state and national titles happen to test the skills of the high end people.
One category is IRON MAN which involves board paddling, surf ski paddling and swimming.Its a pure endurance race.
TH was a champion in his earlier years.Looks like he is into photography these days.
https://www.youtube.com/results?search_query=trevor+hendy+p950