In July 2013, we published “GPS Alphabet Soup” covering the five types of GPS approaches in some depth. A reader suggested a follow-on article with a table that gathers all the approach types and their key characteristics in one place. That seemed like a fine idea and it also affords us the opportunity to share some additional information.
Approach Secrets
Key Takeaways:
- The article distinguishes between the official (ILS-only) and practical definitions of a "precision approach," introducing "Approach with Vertical guidance" (APV) for practical precision, largely enabled by WAAS for GPS approaches like LPV.
- It explains the difference between linear (basic GPS, LNAV) and angular (ILS, VOR, and converted LP/LPV GPS) course deviation, highlighting how angular presentation in LP/LPV enhances precision akin to traditional ground-based systems.
- The prevalence of GPS-based approaches (LPV) now numerically dwarfs traditional ILS, while discussing the specific characteristics, components, and operational considerations (e.g., obstacle clearance, integrity alarms) of ILS and VOR approaches.
Key takeaways sponsored by Aviator Pro | Start Your Training ->
See a mistake? Contact us.
