Runway Awareness and Advisory System

The Runway Awareness and Advisory System (RAAS) is an electronic detection system manufactured by Honeywell Aerospace, that notifies aircraft flight crews on the ground of their position relative to their allocated runway.

Overview
A view from the SmartRunway system that is often added to RAAS.

According to Honeywell, who developed RAAS, runway incursions are a leading cause of aviation accidents and fatalities, costing approximately $1 billion annually.[1]

RAAS functions by providing audible alerts to confirm runway identification, and also provides an aural alarm if it detects undue acceleration (indicating an attempt to take off) while the aircraft is on any taxiway instead of a designated runway. Its function is possible by a software enhancement to the aircraft's terrain awareness and warning system (TAWS) or enhanced ground proximity warning system (EGPWS).[2]

Entrance into service

Alaska Airlines announced in September 2008 that its entire airline fleet of Boeing 737s will be equipped with RAAS by the end of September. That will be the first airline fleet to be completely equipped with this system.[3] Ryanair was the first European airline to introduce RAAS.[4] In 2016 Ryanair committed to equip all its fleet with RAAS,[5] which was mostly complete by 2019.[6]

References
  1. "Runway Awareness and Advisory System - RAAS". aerospace.honeywell.com. Retrieved 20 November 2022.
  2. "Terrain Avoidance Technology: What Lies Ahead?". April 2006.
  3. Aviation Week & Space Technology, Vol. 169 No. 10, 15 September 2008, "RAAS-Ready", p. 16
  4. "Ryanair Group corporate safety strategy 2020-2024" (PDF). Retrieved 20 November 2022.
  5. "Ryanair annual report 2016" (PDF). Retrieved 20 November 2022.
  6. "Ryanair annual report 2019" (PDF). Retrieved 20 November 2022.


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