The black triangles are usually located on the cabin wall above specific windows, typically near the wings of the aircraft. They can be found on many commercial airplanes, including certain Boeing and Airbus models.
Although they may appear insignificant, these markers help flight crews quickly identify the best viewing points for observing the aircraft's wings during flight.
Why Are They Located Above Certain Windows?
The windows marked by black triangles provide one of the clearest views of critical parts of the aircraft's wings.
Pilots and cabin crew may occasionally need to visually inspect:
- Wing flaps
- Slats
- Ice accumulation
- Wing surface conditions
- Engine-related observations
During unusual situations, being able to quickly locate the ideal observation window can save valuable time.