Which airports use MLS?
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Dont know if any now, but I think it was used / experimented with in Russia abit and I remember hereing it was also experimented with in Cranfield UK but them just fables maybe.
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At the risk of being labelled a pedant - and as others have subtly pointed out - airports don't use an MLS, aeroplanes do.
And just to prove that this isn't a completely wasted post, there was one at Cardiff a few years back, maybe ten years ago. I think it was part of the same trial as resulted in the installation at Heathrow - might have been a different manufacturer's bit of kit to permit comparison. No idea if it's still there I'm afraid.
And just to prove that this isn't a completely wasted post, there was one at Cardiff a few years back, maybe ten years ago. I think it was part of the same trial as resulted in the installation at Heathrow - might have been a different manufacturer's bit of kit to permit comparison. No idea if it's still there I'm afraid.
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MLS in the US
There are a few airports in the US that have MLS approaches still - Google search . If it works, should return about four pages of airports with MLS approaches. Mostly military or Alaskan airports.
Edit: Ignore the MLS VOR and the KMLS airport.
Edit: Ignore the MLS VOR and the KMLS airport.
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When I left ATC at the beginning of this year, Heathrow was in the process of having MLS installed on all four ends of the parallels. As I recall, the principal user initially would be the BA airbus fleet. The advantage would arise in low visibility conditions when these aircraft could be positioned closer to the aircraft ahead because with MLS equipped aircraft, the localiser sensitive area constraints do not apply. This would increase hourly runway capacity in low vis conditions. I don't know how far the project has progressed.
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Microwave Landing System...
The only airport in Australia fitted with the system was Canberra (CBR)
I beleive it was an Austaralian invention more acurate than other ILS systems
Was to be fitted to many comercial aircraft in Australia until GPS made it somewhat redundant.
Only aircraft I have seen with MLS systems were ex BA 767 operated by QF. Fitment was by BA for landing at LHR etc where landing in PEa soup is a common thing.
I have not heard of any new MLS installations at airports due to local GPS ground stations being fitted to many airports for accurate GPS approaches.
Only way MLS will get up again is if the USA threatens to turn off GPS systems
My 2 cents
The only airport in Australia fitted with the system was Canberra (CBR)
I beleive it was an Austaralian invention more acurate than other ILS systems
Was to be fitted to many comercial aircraft in Australia until GPS made it somewhat redundant.
Only aircraft I have seen with MLS systems were ex BA 767 operated by QF. Fitment was by BA for landing at LHR etc where landing in PEa soup is a common thing.
I have not heard of any new MLS installations at airports due to local GPS ground stations being fitted to many airports for accurate GPS approaches.
Only way MLS will get up again is if the USA threatens to turn off GPS systems
My 2 cents
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The only places I've ever seen them is at US Air Force Bases. There is one set up at Little Rock Air Force Base in Arkansas. As mentioned before, it would be a good system, if there was no GPS.
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I'm pretty sure that the NASA Shuttle Landing Facility (KTTS) has an MLS system. If I recall correctly the shuttle uses it. Also, from talking to a Controller who was a QA Facility rep he said that one of the major reasons that they wanted to implement it was for the multiple and curved "localizer" beams, enabling them to vector multiple aircraft onto the Final approach course and to set up a precision approach at airports that have obstructions on the final approach course.
