I live near a major airport and see commercial planes with huge front headlights shining in the night sky. What could they be good for way up in the sky, though? I get that when they are taking off/landing headlights are necessary. Why not give them lights like a boat, with a green in front and a red in back?

  • @Ziggurat@sh.itjust.works
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    286 months ago

    The big white light is used for landing.

    Moreover, while it’s not legally required, most airliner would turn it on when changing altitude, in order to improve other planes siftuational awarness

    (I was curious when visiting family living on a hill with a view on the airport down the valley)

  • @NeoNachtwaechter@lemmy.world
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    6 months ago

    like a boat, with a green in front and a red in back?

    Boats and planes have green at their starboard and red at their board side.

  • @SolOrion@sh.itjust.works
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    206 months ago

    They’re supposed to keep their lights on under 10000ft. They’re less for the pilots, at least aside from takeoff/landing, and more for other planes.

    Idk why that specific configuration was chosen- to pull double duty, I guess? They’re functionally landing lights, but also warning lights if they’re low/in crowded airspace.

    I just googled the question, and looked around a bit so it’s possible this is wrong.

    • hendrik
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      6 months ago

      It’s probably correct. There has to be some fixed rule. And with airplanes, a lot depends on altitude. They want to be seen. They want to see what’s in front of them during critical phases like takeoff and landing. And probably not switch on and off arbitrary things like lights, just when they’re most busy with other things.

  • @RememberTheApollo_@lemmy.world
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    6 months ago

    There are generally two main sets of lights. Landing and taxi lights. Don’t get all pedantic on me, pilots, about wing, taxi, logo, blah blah.

    The taxi lights are usually on the nose gear, and you won’t see them until just before or after landing. Some techniques have pilots turning on the taxi lights when cleared to land as a reminder.

    The landing lights are the really bright “high beams” that you see for miles. Most large airlines have these lights on up to or passing down through 18,000 feet, or maybe some other high altitude. The reason they’re on for long periods is for safety and visibility reasons, the time below 18 is the busiest airspace with the most changes in altitude and heading. These large lights are usually in the wings, sometimes there are additional landing lights on the nose gear, or on the aircraft nose on smaller aircraft.

    • BigFig
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      56 months ago

      Don’t get all pedantic on me, pilots

      But that’s like…what they do. It’s what they live for.

      • Lol, precisely why it’s there.

        “Well, at [airline] we [do it a different way]…”

        “Well akshully [airplane] has [lights someplace else]…”

        The old joke is:

        “How do you find out who the pilot is at the party?”

        “You don’t have to, he’ll tell you.”

      • @neidu3@sh.itjust.works
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        36 months ago

        Hobby pilot, here. Yup, spot on. But for the most part, the comment you responded to was also pretty much spot on, so I have no complaints.

        Can’t speak for any ATPL holders, though, so let’s hope they don’t see this thread.

  • teft
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    6 months ago

    So they can flash them to warn the other planes about the air cops hanging out in the clouds. /s

    This is what I found with a quick web search:

    Do Planes Fly with Headlights on?

    Planes only fly with headlights on in scenarios that call for it. Those scenarios include flights that take place in crowded air spaces, when flying below 10,000 feet, and upon takeoffs and landings. It’s also common for pilots to turn on the headlights on their aircrafts when changing flight levels, to help increase visibility to other aircrafts, and in emergency circumstances to communicate with personnel on the ground.

    Also the green light is on the right side of the plane, the red light is on the left, and the white lights are at the stern. Same as a boat.

  • 🇰 🌀 🇱 🇦 🇳 🇦 🇰 ℹ️
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    6 months ago

    Simple answer: Visibility by other aircraft and ground control. The colors and blink patterns also tell them what orientation the craft is in, though I’ve forgotten the specifics as to what means what; I do remember solid white being the front.

  • @atrielienz@lemmy.world
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    6 months ago

    It’s for identification, navigation, as well as light. You can tell which way a plane is facing/ which way it’s moving, and which side of the plane you’re looking at based solely on the lights and their color. That’s important for night flights. The other commenter is correct that most planes have lights on either side and the lights correspond to the colors standard for that side. So, right side is green, left side is red, etc.

    The article below has more information on what the lights do if you’re interested still.

    https://pilotinstitute.com/airplane-lights/