lend (v.a ärilise lennutranspordi lend), kus õhusõidukit kasutatakse eritoiminguteks näiteks põllumajanduses, ehituses, fotograafias, seire, vaatluse ja patrullimise korral, lennureklaamis ning tehniliste kontroll-lendude tegemisel
any operation, other than commercial air transport operation, where the aircraft is used for specialised activities such as agriculture, construction, photography, surveying, observation and patrol, aerial advertisement, maintenance check flights
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Valdkond ICAO lisade põhjal loodud klassifikaatori järgi: Lennutegevus
Before commencing a specialised operation, the pilot-in-command shall conduct a risk assessment, assessing the complexity of the activity to determine the hazards and associated risks inherent in the operation and establish mitigating measures.
Note that commercial operations and specialised operations are not exclusive, i.e. an SPO can be a commercial operation but it also can be a non-commercial operation. For example, an agriculture work, if done by a farmer on their own farm, would be non-commercial. If the same farmer did the same activity on a neighbour's farm for a fee, this would be a commercial operation (but not a CAT since no transportation takes place).