Definition
An evaluation performed by the FAA, or by a procedure designer, of the area surrounding an airport runway to determine whether an aircraft can depart in any direction without needing a specific instrument departure procedure to avoid obstacles. If the assessment finds that obstacles in all sectors around the airport can be cleared by climbing at the standard climb gradient of 200 feet per nautical mile, the airport is approved for diverse departures, meaning a pilot may turn in any direction after takeoff once at or above 400 feet above the departure end of the runway.
Plain English
It is the FAA's check of the airspace and terrain around an airport to confirm that a pilot can safely climb out in any direction after takeoff using a normal climb rate, without hitting anything.
Context Anchor
Seen in instrument departure planning, especially when deciding whether a runway can use a standard diverse departure or needs a published obstacle departure procedure.
Derivation
Diverse comes from the Latin diversus, meaning 'turned in different directions.' In this context it signals that the assessment covers every direction of departure, not just one published route.
Why Pilots Care
It guarantees obstacle clearance when ATC clears you for a diverse departure instead of a published procedure.
Grounding Statement
Picture standing on the runway and drawing a large circle around the airport; every point inside that circle must allow a safe climb.
Intuition Check
Do not read “diverse” as “many different obstacles.” Here, “diverse” means the aircraft may be able to depart in different directions after the required initial climb because the obstacle area has been checked.
Example Sentence 1
Because the airport had passed a diverse obstacle assessment, the crew was able to fly the runway heading after takeoff and turn on course as soon as they reached 400 feet above the departure end.
Example Sentence 2
Because the airport had completed a diverse obstacle assessment, the controller could issue a heading without additional restrictions.