SIDs & STARs: Let’s discover the Standard Instruments

Standard instrument departures (SIDs) and standard instrument arrivals (STARs) are charted instrument procedure designs depicting the lateral profile that pilots must follow for landing or departing at suitably equipped aerodromes. Various level and speed restrictions apply along the route.

There is a standardized system of communication for SID and STAR procedures to ensure efficient and concise communication that would otherwise require long and complex radio transmissions between the pilot and air traffic control.


SID and STAR designs and standardized transmissions are an effective way of communicating a large amount of complex information for safe and efficient departures and arrivals and are in place worldwide through the International Civil Aviation Organization (ICAO).


With our system SARA, the airport will be able to verify the respect of the Standard Instruments and apply sanctions where it is necessary to improve respect of the noise-abatement procedures.

There are 3 types of SID:

  1. Straight departure: procedure that does not require a turn greater than 15 ° with respect to the extension of the centerline of the runway.
  2. Turning departure: it is a type of procedure which requires a turn greater than 15 ° with respect to the extension of the centerline of the runway, the first turn must be performed upon reaching the TP (Turning Point) which guarantees minimum separation from the highest obstacle below it 120 m. This separation may vary according to the morphology of the terrain and the average wind recorded in the airport area.
  3. Omnidirectional departure: this is a type of procedure in which there is usually no radio assistance available to pilots to perform a normal SID. Pilots will be able to tack in any direction upon reaching a point published on the procedure map.

The carrying out of a SID is the responsibility of the pilot in command.

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