Definition
The narrative text portion of a Standard Instrument Departure (SID) chart that spells out, in plain language, the route, altitudes, headings, and instructions a pilot must follow after takeoff. It complements the graphic depiction of the SID and provides the specific step-by-step flying instructions, including any climb gradients, crossing restrictions, and transition routes.
Plain English
It's the written-out instructions on a departure chart that tell you exactly what to do after takeoff -- where to fly, how high to climb, and which turns or fixes to use.
Context Anchor
You see a departure description on a SID or other published instrument departure procedure, usually when briefing the procedure before an IFR takeoff.
Why Pilots Care
Provides the precise, legally binding guidance needed to stay on the published departure route and avoid terrain or traffic conflicts.
Intuition Check
Do not treat a departure description as casual background text. In this context, it is part of the procedure and may contain instructions the pilot is expected to follow.
Example Sentence 1
Before takeoff, the crew briefed the departure description on the SID, noting the required climb to 3,000 feet before turning on course.
Example Sentence 2
The departure description required an immediate left turn to 270 degrees and a climb to 3,000 feet.