Aerodrome Reference Code
The ICAO Aerodrome Reference Code is a two part categorisation of aircraft types which simplifies the process of establishing whether a particular aircraft is able to use a particular aerodrome. It is included in ICAO Annex 14. It has two 'elements', the first is a numeric code based on the Reference Field Length for which there are four categories and the second is letter code based on a combination of aircraft wingspan and outer main gear wheel span.
Element 1 - Reference field length
||Aeroplane reference field length
|1||< 800 m||DE HAVILLAND CANADA DHC-6/PIPER PA-31|
|2||800 m, but < 1200 m||ATR ATR-42-300/320/BOMBARDIER Dash 8 Q300|
|3||1200 m, but < 1800 m||SAAB 340/BOMBARDIER Regional Jet CRJ-200|
|4||1800 m and above
||BOEING 737-700/AIRBUS A-320|
Field length means the balanced field length (which is when the take-off distance required is equal to the accelerate-stop distance required) if applicable, or take-off distance in other cases. Aeroplane reference field length is defined as "the minimum field length required for take-off at maximum certificated take-off mass, at sea level, in International Standard Atmosphere conditions in still air and with zero runway slope as documented in the Aircraft Flight Manual (AFM) or equivalent document.
Element 2 - Wingspan
Element 2 of the Code is derived from the most restrictive of either the aircraft wingspan or the aircraft outer main gear wheel span. The categories are as follows:
|Code letter||Wingspan||Typical aeroplane|
|A||< 15 m||PIPER PA-31/CESSNA 404 Titan|
|B||15 m but < 24 m||BOMBARDIER Regional Jet CRJ-200/DE HAVILLAND CANADA DHC-6|
|C||24 m but < 36 m||BOEING 737-700/AIRBUS A-320/EMBRAER ERJ 190-100|
|D||36 m but < 52 m||B767 Series/AIRBUS A-310|
|E||52 m but < 65 m||B777 Series/B787 Series/A330 Family|
|F||65 m but < 80 m||BOEING 747-8/AIRBUS A-380-800|
It should be noted that Element 2 is often used on its own since it has direct relevance to detailed airport design.