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BTY060030 LAS290052 BTY115018 BTY J92 LIDAT TPH206010 TPH
By comparing flight plans filed with the Federal Aviation Administration (FAA) to actual flight-data from commercial vendors, we see from time to time that flights to Area 51 file flight plans to something called TKM. So what is TKM? There is no published ICAO code called KTM or KTKM (which would be the international version). Is TKM the actual “real” FAA designation for Groom Lake? The short answer is no. Although TKM looks like an airport code and appears from time to time in flight plans, it doesn’t correspond to any published ICAO codes in Federal Aviation Administration databases. Except one. In FAA database 7350.7W: “Location Identifiers,” the listing for the Tonopah Test Range has TKM listed as a “tie-in” facility to TNX. What is a “tie-in facility”? The FAA’s answer is that “’FAA TIE-IN FACILITY’ is the telecommunications facility that handles flight plan messages for the listed landing facility or navigational aid.” This doesn’t help clear things up. Under the FAA’s stated rules, the “tie-in” facility TKM should be in charge of communications for TNX, but we know that this is not the case. Furthermore, we cannot find any other references to TKM in Federal Aviation Administration records. So, we know that TKM is often used to designate flights to Groom Lake and that it’s somehow attached to TNX, but we know little else.