• Cocodapuf@lemmy.world
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    7 months ago

    This sounds legitimately annoying… But why is this canceling flights? Do the pilots not carry maps? Plus, they’re in the air, can’t they rely on radar guidance? They may have radar on the aircraft, but there’s definitely ground based radar as well.

    Pilots are very well trained, they should be able to handle this… What did pilots do in 1970, before gps existed?

    • Halcyon@discuss.tchncs.de
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      7 months ago

      Not an expert, but given the high numbers of planes simultaneously in the air, it’s critical to know high precision position data and not estimated numbers based on maps and manual triangulation with a calculator. That might have been viable decades ago, but the tightly scheduled flights nowadays operate with minimal intervals between the flights. Even if pilots still master the old craft of navigation, it is simply not practical in an overcrowded sky, where minimization of risks is paramount.

    • brianorca@lemmy.world
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      7 months ago

      They are cancelling flights because those specific airports don’t have the equipment to provide a precision landing (ILS) during low visibility weather. They only published a landing procedure with GPS. They will now spend a few months installing the ILS system to enable such landings so they can resume commercial flights.

      Before GPS, all airports would be either VFR only or would have an ILS system installed. Since then, some airports were built without an expensive ILS but used a published GPS approach to allow low-vis landings.

      They could have continued flights with only VFR navigation, but that would seriously restrict the weather they could operate in.