Appendix C - Background information on terrain awareness and warning systems (TAWSs)

• ED Decision 2022/008/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

Appendix C – Background information on terrain awareness and warning systems (TAWSs) ED Decision 2022/008/R (a) General This Appendix provides additional references, background information, and guidance for maintenance testing, as appropriate to TAWS installations. (b) Related references (1) EASA (i) ETSO-C151b Terrain Awareness and Warning System (TAWS) (ii) ETSO-C92c Ground Proximity Warning, Glide Slope Deviation Alerting Equipment dated 24/10/2003 (iii) ETSO-C10b Aircraft Altimeter, Pressure Actuated, Sensitive Type dated 24/10/2003 (iv) ETSO-2C87 Low Range Radio Altimeters dated 24/10/2003 (v) ETSO-C106 Air Data Computer dated 24/10/2003 (vi) ETSO-C115b Airborne Area Navigation Equipment using Multi-Sensor Inputs dated 24/10/2003 (vii) ETSO-C129a Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS) dated 24/10/2003 (viii) ETSO-C145 Airborne Navigation Sensors Using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS) dated 24/10/2003 – ETSO-C145c Airborne Navigation Sensors Using the Global Positioning System Augmented by the Satellite Based Augmentation System (SBAS) dated 21/12/2010 (ix) ETSO–C146 Stand-Alone Airborne Navigation Equipment Using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS) dated 24/10/2003 – ETSO-C146c Stand-Alone Airborne Navigation Equipment Using the Global Positioning System Augmented by the Satellite Based Augmentation System (SBAS) dated 21/12/2010 (x) ETSO-C196a Airborne Supplemental navigation Sensors for Global Positioning System Equipment Using Aircraft-Based Augmentation dated 05/07/2012 (xi) ETSO-C105 Optional Display Equipment for Weather and Ground Mapping Radar Indicators dated 24/10/2003 (2) ICAO Doc 8168 Aircraft Operations Procedures for Air Navigation Services Fifth edition – 2006 Volume II Construction of Visual and Instrument Flight Procedures (3) EUROCAE (i) ED-98 () User requirements for Terrain and Obstacle Data (any edition - last edition B dated September 2012) (ii) ED-76 Standards for processing aeronautical data dated October 1998 (identical to RTCA DO-200A) (4) RTCA DO-161A Minimum Performance Standards-Airborne Ground Proximity Warning Equipment dated 27/05/1976 [Issue: CS-ACNS/4]