EFB electronic charts & moving-map limits
EFB can show interactive electronic aeronautical charts, e.g. en route, area, approach, airport surface maps (AC 700-020 Appendix B).
Electronic chart standard (AC 700-020 Appendix I S2):
- Safety at least equal to the paper chart replaced.
- Equally readable in light and dark.
- Screen size and resolution must be shown to give that safety.
Manipulation: an electronic chart may be panned, scrolled, zoomed and rotated (AC 700-020 Appendix K S2).
Moving-map aids (AC 700-020 Appendix B, Appendix G, Appendix K):
| Aid | What it is | Limit |
|---|---|---|
| AMMD (Airport Moving Map Display) | Airport map display | Ground operations only; never the primary taxi navigation means (Appendix K, AMMD (1)(b)) |
| Own-ship position | Aircraft's own position drawn on an electronic map (s.2.3(k)) | Situational-awareness aid only; never a tool for airborne navigation or surface manoeuvring. Strategic use (e.g. situational awareness), never to manoeuvre the aircraft, on ground or in air (Training Requirements for Use of Own-Ship Position (a)) |
Manoeuvring references (own-ship position):
| Where | Reference |
|---|---|
| Ground | Visual identification of airport/taxiway/runway |
| Air | Installed primary flight and navigational displays |
- Own-ship and primary displays disagree: use primary displays.
Trap: assuming an electronic chart only needs to be readable in daylight or must stay fixed on screen. It must match paper in light and dark, and all four manipulations are permitted. Own-ship position and the AMMD are never manoeuvring or primary taxi references.
References
- AC 700-020 Appendix B (electronic aeronautical charts as Type B EFB applications)
- AC 700-020 Appendix I S2
- AC 700-020 Appendix K S2
- AC 700-020 Appendix K, AMMD (1)(b)
- AC 700-020 s.2.3(k)
- AC 700-020 Training Requirements for Use of Own-Ship Position (a)-(c)
- AC 700-020 Appendix B
- AC 700-020 Appendix G
- AC 700-020 Appendix K