What defines a sweeper in water hazards?

A sweeper in water hazards refers to an overhanging obstacle above the water, such as a tree branch or other vegetation that extends into the water’s surface. These obstacles can pose significant dangers during water rescue operations. When paddling or swimming in fast-moving water, a sweeper can catch unsuspecting individuals, potentially dragging them under the water and leading to life-threatening situations. Understanding the nature of sweepers is critical for rescuers, as it helps them to identify and avoid areas where these hazards are present, ensuring safer navigation and rescue attempts.

In this context, other options do not accurately represent a sweeper. Submerged rocks, for example, are underwater hazards, while a fast-flowing section of a river may indicate turbulence but does not describe an overhanging feature. A calm water area would be less associated with the risks that a sweeper presents in more turbulent environments.