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Don't sell your loran
At the controller's "Communicating for Safety" conference, one-time FAA
Administrator Langhorn Bond told me that loran is coming back as a backup to GPS. He obviously sits on a lot of committees, work groups, etc internationally, and has a lot of good info. He pointed out that on two occasions sunspots have essentially shut down GPS, and he believes that sole-source GPS may never happen. He was particularly disturbed by a GPS NOTAM saying, in essence, that if you have WAAS you don't need anything else. Controllers as a group are unhappy with approach designers, who do not work with ATC facilities when designing GPS approaches. Angel Fire, NM, was given as an example...one IAF 15 miles from the centerpost fix on a basic-T TAA, with the missed approach waypoint 20 miles from the airport. A 172 on the GPS approach can shut down thousands of square miles of airspace, overlying several airports and some Nellis AFB IR routes, for 45 minutes to an hour if they execute the miss to the missed approach hold. The controllers would prefer that pilots ask for alternative miss procedures that would keep them in closer before they initiate the approach. Bob Gardner |
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