What is a requirement regarding altitude during a SID clearance?

The requirement that altitude must comply with both SID routing and assigned limits is important for safe and efficient operations during departures. Standard Instrument Departures (SIDs) are designed to provide a clear and structured path for aircraft to follow as they leave the airport, minimizing the risk of conflicts with other traffic and ensuring safe separation from terrain and obstacles.

When a SID is in effect, it prescribes specific routing and associated altitudes that must be adhered to. Pilots are required to maintain the assigned altitude while following the SID to ensure they remain within the defined parameters that facilitate safe traffic flow and minimize delay. This ensures that pilots are operating within the airspace design regulations and are conforming to the expectations set forth by air traffic control.

Thus, compliance with both the routing and the assigned altitude is crucial to maintaining organized air traffic control systems, avoiding potential hazards, and ensuring the efficient operation of air traffic.