Operation Type Taxonomy


The ADREP operation type taxonomy is a set of terms used by ICAO to categorize an occurrence by the type of flight which was conducted and to allow safety trend analysis on these categories. The ADREP operation type taxonomy is part of the ICAO accident data reporting system (ADREP).


Commercial Air Transport (CAT)

Scheduled Commercial Air Transport (SCAT)

Air services:

  • involving the transport of passengers, cargo or mail for remuneration or hire, and
  • open to use by the general public, and
  • operated according to a published timetable or with such a regular frequency that it constitutes an easily recognizable systematic series of flights which are open to direct booking by members of the public.

Detailed options available for scheduled commercial air transport are:

  • SCAT-IP: International Passengers
  • SCAT-DP: Domestic Passengers
  • SCAT-IC: International Cargo
  • SCAT-DC: Domestic Cargo

Non-Scheduled Commercial Air Transport (SCAT)

Charter flights and special flights performed for remuneration other than scheduled commercial flights.

Detailed options available for non-scheduled commercial air transport are:

  • NSCAT-IP: International Passengers
  • NSCAT-DP: Domestic Passengers
  • NSCAT-IC: International Cargo
  • NSCAT-DC: Domestic Cargo

Other Commercial Air Transport (CAT-O)

Any other commercial air transport flights like air taxi, emergency medial services, ferry/positioning flights etc.

Non Commercial Air Transport

General aviation (GA)

All civil aviation operations other than scheduled air services and non-scheduled air transport operations for remuneration or hire or aerial work.

Aerial work (AW)

An aircraft operation in which an aircraft is used commercially or non commercially for specialized services such as agriculture, construction, photography, surveying, observation and patrol, search and rescue, aerial advertisement, etc.

State flight (SF)

An aircraft operation in which an aircraft is used for military, customs, police or other state internal services.


The above terms are an exact subset of the ECCAIRS Operation Type taxonomy. The mapping is as defined below. When reporting to ICAO, using the specific operations submitted through the free text field, mapping may be performed to a lower level term in ECCAIRS.

Mapping into ECCAIRS
CATCommercial Air Transport1000000
SCATScheduled air service1010000
SCAT-IPScheduled international passenger flight1010101
SCAT-DPscheduled domestic passenger1010201
SCAT-ICscheduled international cargo flight1010102
SCAT-DCscheduled domestic cargo1010202
NSCATnon scheduled revenue operations1020000
NSCAT-IPnon scheduled international passenger flight1010101
NSCAT-DPnon scheduled domestic passenger1010201
NSCAT-ICnon scheduled international cargo flight1010102
NSCAT-DCnon scheduled domestic cargo1010202
CAT-OOther commercial air transport1040000
GAGeneral Aviation2000000
AWAerial Work3000000
SFState flights4000000


  1. Only one operation type allowed per aircraft


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