What are SODPROPS?
SODPROPS stands for Simultaneous Opposite Direction Parallel Runway OPerationS. SODPROPS regulations allow airports to move traffic in opposite directions while maintaining safety standards. Opposite direction operations are often useful at airports with noise sensitive neighbors on one side, where arriving and departing traffic over water or away from residential areas might be preferred.
SODPROPS is most commonly associated with Sydney Kingsford Smith Airport. At Sydney, traffic can arrive on Runway 34L and depart Runway 16L, keeping flights over the bay.
SODPROPS are only possible during periods of light winds and good visibility, which often makes for excellent photography.
What’s your favorite aviation acronym? Is there a better one than SODPROPS? Let us know in the comments!
![An example full flight summary response from the Flightradar24 API: { "data": [ { "fr24_id": "0987654321", "flight": "SK1415", "callsign": "SAS1415", "operated_as": "SAS", "painted_as": "SAS", "type": "A20N", "reg": "SE-DOY", "orig_icao": "ESSA", "orig_iata": "ARN", "datetime_takeoff": "2023-01-27T05:15:22", "runway_takeoff": "12R", "dest_icao": "EKCH", "dest_iata": "CPH", "dest_icao_actual": "EPWA", "dest_iata_actual": "WAW", "datetime_landed": "2023-01-27T06:15:10", "runway_landed": "27L", "flight_time": 3600, "actual_distance": 1007.74, "circle_distance": 6245, "category": "Passenger", "hex": "4A91F9", "first_seen": "2023-01-27T05:06:22", "last_seen": "2023-01-27T06:18:10", "flight_ended": "true" } ] }](https://www.flightradar24.com/blog/wp-content/uploads/2025/04/Flight-summary-API-cover-300x148.jpg)
![An example full flight summary response from the Flightradar24 API: { "data": [ { "fr24_id": "0987654321", "flight": "SK1415", "callsign": "SAS1415", "operated_as": "SAS", "painted_as": "SAS", "type": "A20N", "reg": "SE-DOY", "orig_icao": "ESSA", "orig_iata": "ARN", "datetime_takeoff": "2023-01-27T05:15:22", "runway_takeoff": "12R", "dest_icao": "EKCH", "dest_iata": "CPH", "dest_icao_actual": "EPWA", "dest_iata_actual": "WAW", "datetime_landed": "2023-01-27T06:15:10", "runway_landed": "27L", "flight_time": 3600, "actual_distance": 1007.74, "circle_distance": 6245, "category": "Passenger", "hex": "4A91F9", "first_seen": "2023-01-27T05:06:22", "last_seen": "2023-01-27T06:18:10", "flight_ended": "true" } ] }](https://www.flightradar24.com/blog/wp-content/uploads/2025/04/Flight-summary-API-cover-768x378.jpg)
5 Responses
The best acronym in aviation is probably “Engine Turn or Passenger Swim”. I think we’ve all forgotten that ETOPS once stood for “Extended-range Twin-engine Operations Performance Standards”.
My favorite term/acronym is ‘Op-up’.
WAFDOF
Wrong Altitude for Direction of Flight
Acronym: EATCHIP = European Air Traffic Control Harmonisation and Integration Programme!
The one you always like to hear when flying : CAVU | Ceiling and Visibility Unlimited