| http://www.w3.org/ns/prov#value | - Here we will list some frequencies and other information to help those who like to spot aircraft on the upper airways & tacan routes over Southwest BritainSwanwick Mil128.700 Southwest sector133.300 Southwest sector133.900 Daventry sector (Includes TR1 VLN-BZN)135.150 Southwest sector (Includes TR1 LND-VLN)252.875 Daventry sector (Includes TR1 VLN-BZN)278.600 Southwest sector (includes TR1 LND-VLN
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