Standard Instrument Departure

A Standard Instrument Departure (SID) is a published IFR flight procedure that provides a pre-planned route from the departure runway to the en-route airway structure. SIDs standardize traffic flow, ensure obstacle clearance, and reduce ATC workload.

• Assigned by ATC as part of the IFR clearance (e.g., "Cleared BREST1 departure")
• Includes specific tracks, altitude constraints, and speed restrictions
• RNAV SIDs require RNAV capability (GPS or FMS navigation)
• Conventional SIDs are based on VOR/NDB radials
• Noise abatement SIDs route traffic away from residential areas
• Engine-out SIDs (or Obstacle Departure Procedures) provide minimum gradient for obstacle clearance with one engine failed
• Programmed into the FMS for automated lateral and vertical navigation