aviation history There have been many changes since the beginning until today. One of them actually involves aircraft doors.
From the very beginning the doors marked with dark lines If you think that, you are wrong.
Aircraft regulations have more to do with the need for safety than with the benefits of new technology.

Accidents in aviation history If we look into it, we see that many of these problems are actually caused by negligence or simple reason. Most of these are based on aircraft doors.
Airplane door panels were not always dark colored. Completely camouflaged doorscannot distinguish between the smoke rising from accidents; Many people lost their lives because they could not be saved.
Therefore, an improved security protocol has been implemented.

in 1965 US Federal Aviation Administration (FAA)has made it mandatory to mark passenger, crew and emergency exit doors on commercial aircraft with thick black lines to clearly identify their surroundings.
Similar steps have been taken in Europe, The visibility of emergency exits and doors has been increased.
Over time, these regulations have been integrated with the aesthetic preferences of airlines.
Nowadays these safety measures are general design aesthetics of aircraft and is implemented in line with airlines’ brand perception. Bold black lines and high-contrast colors have become an integral part of aircraft designs.
In addition, the direction arrows are on the wing emergency evacuations It includes an important element of awareness so that passengers can safely exit the aircraft during the flight.
Sources: Aviation Voice, AirlineRatings
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