Rescue swimmers and divers???
Not on this boat race, all the choppers were either TV ships, or air working with photographers. The rescue birds are on standby at their bases. or at least they were, last time I flew this race was in 2000.
Wear a life jacket, carry a dinghy if there's room, otherwise the crew takes their chances. Never been a problem for the aircraft in all the years that helicopters have covered this race. But they have rescued a large number of boats in trouble.