What is a GPS approach?

What is a GPS approach?

What is a GPS Approach? The Global Positioning System (GPS) Approach is defined by a series of waypoints and altitude restrictions that the pilot will follow to the runway threshold, free of conventional guidance such as a localizer/glideslope etc.

Are there any GPS precision approaches?

GPS is officially a non-precision approach because it does not meet the ICAO standards for a precision approach, like an ILS. This will affect your alternate selection in IMC because you will need to use the non-precision standard alternate minimums.

What is the difference between RNAV and GPS approaches?

Required Navigation Performance (RNP) is a form of navigation that allows an aircraft to fly directly between two 3D points in space. The fundamental difference between RNP and RNAV is that RNP requires on-board performance monitoring and alerting capability.

What is TSO 146?

The Wide Area Augmentation System (WAAS) is a navigation system comprising satellites and ground stations that improve the accuracy of the Global Positioning System (GPS). WAAS is capable of supporting all phases of flight, including instrument approaches to minimums like those of an Instrument Landing System (ILS).

Which is the GPS equivalent of a localizer approach?

LP is the GPS equivalent of a localizer approach. Older WAAS receivers may not contain LP capability unless the receiver has been upgraded. LP minimums are published only if they provide lower minimums than LNAV.

What are the different types of GPS approaches?

not present Approach Type Nonprecision (NP) Vertical Guidance (V) WAAS Required? Course Guidance Typical Minimums LNAV NP No Linear 400 MDA LNAV+V NP+V Yes Angular 400 MDA LNAV/VNAV APV Yes Angular 350 DA LPV APV Yes Angular 200 DA

What should the RNP be for a GPS approach?

Virtually all GPS approaches require an RNP (Required Navigational Performance) of 0.3, which means an aircraft tracking the final approach course with a centered needle can be expected to be within 0.3 nm of the centerline 95 percent of the time.

What does LNAV stand for in a GPS approach?

• LNAV -lateral navigation only, no descent guidance • LPV (localizer performance with vertical navigation) –An approach with WAAS generated vertical guidance to a Decision Altitude (DA)