Operation Type Taxonomy

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
CAT Commercial Air Transport 1000000
SCAT Scheduled air service 1010000
SCAT-IP Scheduled international passenger flight 1010101
SCAT-DP scheduled domestic passenger 1010201
SCAT-IC scheduled international cargo flight 1010102
SCAT-DC scheduled domestic cargo 1010202
NSCAT non scheduled revenue operations 1020000
NSCAT-IP non scheduled international passenger flight 1010101
NSCAT-DP non scheduled domestic passenger 1010201
NSCAT-IC non scheduled international cargo flight 1010102
NSCAT-DC non scheduled domestic cargo 1010202
CAT-O Other commercial air transport 1040000
GA General Aviation 2000000
AW Aerial Work 3000000
SF State flights 4000000


  1. Only one operation type allowed per aircraft


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