Passengers often assume that airplanes will immediately land upon reaching the destination airport. After all, lingering in the air wastes time and fuel. In many cases, however, airplanes will enter a holding pattern. What is a holding pattern exactly?
The Basics of Holding Patterns
Holding patterns are flight maneuvers that involve flying over an airport while awaiting clearance to land. They typically involve an oval, racetrack-like shape with two straight legs connected by smooth turns. Pilots will continue to fly in this pattern until Air Traffic Control (ATC) has given them clearance to land.
Why Airplanes Enter Holding Patterns
Airplanes enter holding patterns for safety purposes. If too many airplanes attempt to land at once — or the conditions are hazardous — accidents may occur. To mitigate these risks, ATC uses holding patterns. They instruct pilots to circle overhead in the aforementioned racetrack-like pattern until it’s safe to land.
Common reasons for entering holding patterns include the following:
- Thunderstorms
- Strong crosswinds
- Runway congestion
- Runway closure
- Ground emergencies
- Airspace restrictions
- Arrival sequencing
The Fix
All holding patterns have a fix. It’s a specific point that serves as a reference point for a given holding pattern. The fix anchors and determines the maneuver. Some fixes come from GPS, whereas others come from VOR or other navigation aids. Regardless, they provide guidance for the holding pattern.
During the inbound leg of a holding pattern, the airplane will fly toward the fix. During the outbound leg, the airplane will fly away from the fix.
How Airplanes Enter Holding Patterns
There are different ways in which airplanes can enter holding patterns. Direct entry is the most common method. The airplane crosses the fix and begins to respective pattern. Parallel entry, on the other hand, involves flying alongside the outbound leg before turning toward the fix. There’s also the teardrop entry, which involves a short angled leg that integrates naturally into pattern.
Fuel Impact
While holding patterns are an important part of modern aviation, they have a direct impact on fuel consumption. The longer an airplane stays in a holding pattern, the more fuel it will consume. Aircraft fuel, of course, is expensive. Even a short hold of just 10 or 15 minutes can have a substantial impact on an airplane’s flight costs.
In Conclusion
Holding patterns are more than just circling in the sky. They are a structured, carefully managed tool that keeps air travel safe. Each loop buys time for controllers to organize traffic, assess weather, or clear a runway, while pilots follow a precise plan anchored by the fix.
