SIDs and STARs Explained
· One min read
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SIDs and STARs are published routes that standardize how aircraft leave and arrive at busy airports.
A SID (Standard Instrument Departure) guides an aircraft from the runway to the en-route airway network. A STAR (Standard Terminal Arrival Route) does the reverse, leading it from the airway network toward the approach.
The benefits are practical:
- Less radio traffic, since the route is already known
- Predictable flows that keep departures and arrivals apart
- Built-in noise abatement and terrain clearance
Instead of dictating every turn, a controller can say "cleared via the SID" or "descend via the STAR", and both sides know exactly what to expect.