To determine the stability of a ram-air canopy during descent, which phase should be monitored closely?

The stability of a ram-air canopy during descent is most critical during the flare phase. This is because the flare phase is when the parachutist prepares for landing by applying tension to the control lines, which alters the angle of attack of the canopy. By managing the flare effectively, the jumper ensures a smooth and controlled descent, minimizing the risk of hard landings or instability that could lead to potential injury.

Monitoring the flare phase helps assess how the canopy responds to control inputs and whether it maintains consistent flight characteristics as the parachutist transitions from descent to landing. Any instability during this phase can result in unpredictable behavior of the canopy, making it essential for jumpers to be vigilant and well-practiced in executing their flare maneuver for a safe landing.

Other phases, while important for overall jump safety, do not directly impact the canopy's stability as directly as the flare phase does. For instance, the deployment phase might indicate an initial opening sequence of the canopy, but stability becomes paramount once the jumper is under the canopy and preparing to land.