In Memory of an “expert” swimmer … who didn't trouble to … 1. Learn to swim well. 2. Swim where it is safe. 3. Swim with the crowd. These simple rules can make all the difference between life and death. Rivers are full of hidden hazards—logs, underwater snags, rocks, and deep holes. Rivers are changeable—the place that was safe today may be a deathtrap tomorrow. Check that your swimming place is safe before you dive in—don't take foolish risks.