Editing Ground proximity warning system (section)

{{Short description|Alert system meant to prevent pilots from flying or taxiing into obstacles}}
{{Use mdy dates|date=October 2011}}
[[Image:GPWSMode2.svg|200px|thumb|A diagram showing two aircraft paths, the lower of which would trigger GPWS]]
A '''Ground Proximity Warning System''' ('''GPWS''') is a system designed to alert [[aircraft pilot|pilots]] if their aircraft is in immediate danger of [[controlled flight into terrain|flying into the ground]] or an obstacle. The United States [[Federal Aviation Administration]] (FAA) defines GPWS as a type of [[terrain awareness and warning system]] (TAWS).<ref name="faa-ac23-18">{{Cite web |url=http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/7ca84861d31651a5862569b2006dbcfe/$FILE/ATTOVW46/AC23-18.pdf |title=Archived copy |access-date=January 15, 2009 |archive-date=January 19, 2016 |archive-url=https://web.archive.org/web/20160119083037/http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/7ca84861d31651a5862569b2006dbcfe/$FILE/ATTOVW46/AC23-18.pdf |url-status=dead }}</ref> More advanced systems, introduced in 1996,<ref>{{cite web|url=http://www51.honeywell.com/aero/technology/key-technologies2/avionics3/egpws.html?c=23 |title=Enhanced Ground Proximity Warning System (EGPWS) – Honeywell Aerospace Engineering |publisher=1.honeywell.com |access-date=October 17, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111002025011/http://www51.honeywell.com/aero/technology/key-technologies2/avionics3/egpws.html?c=23 |archive-date=October 2, 2011 |df=mdy-all }}</ref> are known as '''enhanced ground proximity warning systems'''  ('''EGPWS'''), a modern type of TAWS.