I’ve been meaning to ask.
The Runway heading markers sometimes changes colour from Green to Orange to red, what does this mean/ what do they indicate?
The favorability for winds on arrival, if I’m not mistaken.
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Sorry, if you already know, but typically you want to be landing with as much of a headwind as possible. So, say you’re landing on hypothetical runway 18. Winds are 360 at 10, 18 should be illuminated green and 36 would be red.
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Hello!
- Green indicates a headwind component.
- Red indicates a tailwind component
- And orange indicates there’s a crosswind component.
As pilots, we would always want to land on the green side, although it’s not always possible mostly because there’s a crosswind. Some airports have special procedures that’ll make you land with a crosswind component, so you’ll have to be careful when landing since speeds will be higher on touchdown.
Just for you to know, Red doesn’t indicate headwind, but a tailwind. For the green colour, it’s called headwind. Just writing this so we can prevent any confusion to everybody 
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Thank you for your correction! I have increased my knowledge about English！!
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All good mate 
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