I believe the answer is: Boating
Water sports ofen being done on an environement where there is strong currents. When accidents occurs on such environment, the body of the sportsmen often brought up by the currents, which make it really hard for the rescue team to do their job before its too late.
One of the leading cause of sportsmen’s deaths while boating is drowning as a result of falling overboard. This can be caused because of not wearing a life jacket assuming their water skills can save them; boat not loaded uniformly if it is disbalanced then the person can be trapped and drown inside it; boating in a strong current river; boating in unsafe places. These last ones can difficult the fact of swimming to save yourself if the boat flips over.
