What is the primary function of a rear-riser flare during landing?

The primary function of a rear-riser flare during landing is to reduce forward speed just before touchdown. This maneuver is essential as it helps the skydiver transition from the high forward speed typical of parachute flight to a slower speed that facilitates a safe landing approach. By pulling on the rear risers, the parachutist essentially stalls the canopy, resulting in a decrease in downward and forward velocities. This action allows for a more controlled landing, minimizing the risk of hard landings that could lead to injuries.

While slowing down descent significantly and maintaining altitude are important aspects of landing, the rear-riser flare specifically targets the reduction of forward speed in the final moments before landing. Maneuvering the canopy horizontally is more associated with turning movements during descent rather than the immediate preparation for touchdown.