What does the triangle above the window on a plane mean?

An especially astute passenger will notice that these little triangles throughout the cabin line up with the wings outside the plane. If flight crew need to check the wings, these triangles let them know the best vantage points for the slats and flaps outside.



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Sci-fi series aside, these black and red, triangle-shaped stickers are actually important reference points for the flight crew — as they're located where the airplane's wings are visible — allowing flight attendants to easily view the flaps and slats on the wings for potential icing problems or issues that may need to ...

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If there is a problem on-board and the crew is unsure about the condition of the aircraft, the triangle indicates what window should be used to inspect flaps, slats or engines or look out for icing. This saves important time in case of an emergency, as the crew doesn't has to search the right window to look out.

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Red: When an aircraft is displayed as red that means that you are currently following that specific aircraft on the map or that the aircraft's transponder is squawking an emergency code. These codes are 7600 (Communication Equipment Failure), and 7700 (General Emergency).

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One Engine Down
In fact, airliners can fly quite well on just one. The Boeing 777 is certified to fly up to five and a half hours with one engine out.

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If there is a problem on-board and the crew is unsure about the condition of the aircraft, the triangle indicates what window should be used to inspect flaps, slats or engines or look out for icing. This saves important time in case of an emergency, as the crew doesn't has to search the right window to look out.

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A deadhead flight is another name for an empty legs flight. This is a flight that occurs when an aircraft has been used for a one-way jet charter and has to either return to its base or fly to another airport to pick up its next passengers.

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There's a logical reason for keeping window shades open during takeoff and landing, which are considered the most critical phases of a flight: safety. In the event of an emergency, flight attendants are trained to look for debris, fire, or smoke outside before initiating an evacuation.

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These tiny holes, also called breather holes, serve as a safety function, by making sure that the outer pane bears all the air pressure (the pressure inside the cabin is much higher than outside). This also ensures that in case the pressure difference becomes high enough, it is the outer pane that breaks off first.

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