Wide Area Augmentation System

WAAS corrects for GPS Satellite position providing increased accuracy and availability for navigation throughout the Continental U.S.

  • Reduces GPS errors down to seven meters
  • Eliminates need for P-RAIM (Predictive-Receiver Autonomous Integrity Monitoring) in the U.S.
  • Provides near ILS Category 1 minimums with no ILS on the field
  • WAAS LPV procedures now surpass the number of Category 1, ILS procedures
  • 1,800 LPV approaches are currently available in the U.S.
  • Enables crew to use IFR rules for approach and landing operations down to a decision height as low as 200 feet above touchdown with visibility minimums as low as 1/2 mile
  • Localizer Performance with Vertical Guidance (LPV) provides backup to ILS in the event that the glideslope is out of service
  • Temperature restrictions are not applicable to LPV approaches
  • Provisioned to support other Satellite-Based Augmentation System (SBAS) such as European Geostationary Navigation Overlay Service (EGNOS)
  • Significantly lowers approach minimums over LNAV/VNAV

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