Localizer performance with vertical guidance (LPV) are the highest precision GPS (SBAS enabled) aviation instrument approach procedures currently available without specialized aircrew training requirements, such as required navigation performance (RNP).
SBAS criteria includes a vertical alarm limit more than 12 m, but less than 50 m, yet an LPV does not meet the ICAO Annex 10 precision approach standard.
[4] In 2014, Avidyne began equipping general aviation and business aircraft with the IFD540 and IFD440 navigators incorporating a touch-screen flight management system with full LPV capability.
[5] LPV is designed to provide 25 feet (7.6 m) lateral and vertical accuracy 95 percent of the time.
[citation needed] As of September 17, 2015 the Federal Aviation Administration (FAA) has published 3,567 LPV approaches at 1,739 airports.