0 someone at a swimming pool or beach whose job is to help people who are in danger in the water -- спасатель
Although providers of leisure services are increasingly providing women-only swimming sessions, some are neither entirely private nor have women lifeguards.
Out of his profit he voluntarily supplies two lifeguards.
We particularly welcome the provision of appropriately trained lifeguards and the introduction of beach safety procedures.
At the inquest, the coroner stated that, if a lifeguard had been present, at least one life could have been saved.
But, of all these paths, the lifeguard wants to take the one that maximizes the probability of a favorable outcome, which (in this case) is the one that minimizes time.
Merely to say that the lifeguard "takes advantage of" this complex higher-order relation ignores the internal structure that must be approximately tuned to this relation within the lifeguard.
If the lifeguard does communicate information about the tides, then there will be perfect agreement.
So we each have a separate right to the plank, and based on that right, the lifeguard has a separate duty to each of us.