Editing Emergency exit (section)

==Aircraft==
[[File:737 emergency-exit.jpg|thumb|upright|[[US Airways|USAir]] [[Boeing 737]] overwing emergency exit]]

In aircraft terms, an "exit" is any one of the main doors (entry doors on the port side of the aircraft and service doors on the starboard side) and an "emergency exit" is defined as an exit that is only ever used in an emergency (such as [[overwing exits]] and permanently-armed exits). 

In the early years, the emergency exit was a hatch in the ceiling of the aircraft. Because in the [[1928 KLM Fokker F.III Waalhaven crash]] the passengers didn't know the location of this emergency exit, one passenger couldn't escape in time and died. As a result, better visibility of the emergency exit inside the cabin was advised by the investigative committee.<ref name=avia>{{cite news|url= http://www.aviacrash.nl/paginas/h-nabr.htm |title=H-NABR verongelukt in de Waalhaven|work=aviacrash.nl |access-date=2 September 2023|language=nl}}</ref><ref name=HV>{{cite news|url= https://resolver.kb.nl/resolve?urn=ddd:011114808:mpeg21:a0007 |title=Het vliegtuigongeval in de Waalhaven|work= [[Het Volk (newspaper)|Het Volk]]|date=25 July 1928|via=[[Delpher]]|language=nl}}</ref>

Passengers seated in [[exit row]]s may be called upon to assist and open exits in the event of an emergency.

The number and type of exits on an aircraft is regulated through strict rules within the industry, and is based on whether the aircraft is single or twin-aisled; the maximum passenger load; and the maximum distance from a seat to an exit. The goal of these regulations is to make possible the evacuation of an airliner's designed maximum occupancy of passengers and crew within 90 seconds even if half of the available exits are blocked.

Any aircraft where the emergency exit door sill height is above that which would make unaided escape possible is fitted with an automatic inflatable [[evacuation slide]], which allows occupants to slide to the ground safely.

{| class="wikitable"
|+ FAA exit types<ref name=FAR25.807>{{cite news |url= https://www.gpo.gov/fdsys/pkg/CFR-2011-title14-vol1/xml/CFR-2011-title14-vol1-sec25-807.xml |work= Code of Federal Regulations |date= 2011-01-01 |title= Section 25.807 - Emergency exits}}</ref>
! Type !! Width !! Height !! Step-up !! Step-down !! Exit limit
|-
| A. || {{cvt|42|in|cm|0}} || {{cvt|72|in|cm|0}} || colspan=2 |Floor level || 110
|-
| B. || {{cvt|32|in|cm|0}} || {{cvt|72|in|cm|0}} || colspan=2 |Floor level || 75
|-
| C. || {{cvt|30|in|cm|0}} || {{cvt|48|in|cm|0}} || colspan=2 |Floor level || 55
|-
| I. || {{cvt|24|in|cm|0}} || {{cvt|48|in|cm|0}} || colspan=2 |Floor level || 45
|-
| II. || {{cvt|20|in|cm|0}} || {{cvt|44|in|cm|0}} || 0 or {{cvt|10|in|cm|0}} || {{cvt|17|in|cm|0}} || 40
|-
| III. || {{cvt|20|in|cm|0}} || {{cvt|36|in|cm|0}} || {{cvt|20|in|cm|0}} || {{cvt|27|in|cm|0}} || 35
|-
| IV.† || {{cvt|19|in|cm|0}} || {{cvt|26|in|cm|0}} || {{cvt|29|in|cm|0}} || {{cvt|36|in|cm|0}} || 9
|}
† 9 passenger aircraft only

Ventral exits must allow the same rate of egress as a Type I exit, tailcone exit are aft of the fuselage.<!--<ref name=FAR25.807/>-->
Aircraft for less than 19 passenger must have one sufficient exit in each side of the fuselage, two per side for more, no more than {{cvt|60|feet}} apart from each other.<ref name=FAR25.807/>

In November 2019, the [[EASA]] allowed "Type-A+" exits with a dual-lane evacuation slide to increase maximum accommodation increased to 480 seats up from 440 with four pairs of doors on the [[A350-1000]], and up to 460 on the [[A330neo|A330-900]].<ref>{{cite news |url= https://www.flightglobal.com/news/articles/a350-1000-maximum-seating-rises-to-480-462615/ |title= A350-1000 maximum seating rises to 480 |date= 29 Nov 2019 |author= David Kaminski-Morrow |work=Flightglobal}}</ref>