Some pilots carry a reserve parachute designed to open in as little as . While reserve parachutes are designed to open fast, they have a system length between 13.3 ft (4.5 m) and 21.9 ft (7.3 m) and usually need at least to slow down a pilot to a safe sink rate (certified design speed according to LTF and EN certifications is max per second). With enough height over ground, many potential issues with the canopy can be resolved without applying the reserve parachute. The required skills can be acquired in SIV trainings, which improve the overall safety of flying by providing a better understanding on the system limitations and practical training of extreme situations.