Localizer performance with vertical guidance (LPV) are the highest precision GPS (WAAS enabled) aviation instrument approach procedures currently available without specialized aircrew training requirements, such as required navigation performance (RNP). Landing minima are usually similar to those in an instrument landing system (ILS), that is, a decision height of 200 feet (61 m) and visibility of 1/2 mile.[1] Although precise and accurate, it is still considered a Non-Precision approach. According to the Instrument PTS, you may use a GPS approach down to LPV minimums to substitute a precision approach.
Examples of receivers providing LPV capability include (from Garmin) the GTN 7xx & 6xx, GNS 480, GNS 430W & 530W, and the post 2007 Garmin G1000 with GIA 63W.
LPV is designed to provide 16 metre horizontal accuracy and 20 metres vertical accuracy 95 percent of the time. Actual performance has exceeded these levels. WAAS has never been observed to have a vertical error greater than 12 metres in its operational history.[citation needed] As of January 15, 2009 the Federal Aviation Administration has published 1,445 LPV approaches at 793 airports. This is greater than the number of published Category I ILS procedures.[citation needed] As of April 3, 2014, there are 3,402 Wide Area Augmentation System (WAAS) LPV approach procedures serving 1675 airports.[2]
See also
References
- ^ "LPV Approach – Localizer Performance with Vertical Guidance". aasfms.com. 2008. Archived from the original on 2009-01-01. Retrieved 2010-02-07.
- ^ [1]