THE IRISH AIR CRAFT SPOTTING

VHF

FREQUENCY  LIST

AIRFIELD FREQUENCIES

ALL FREQUENCIRS IN MEGAHERTZ (MHZ)

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COMPANY  FREQUENCIES

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VHF  ACARS   FREQUENCIES

Updated 1st September, 2004

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The following frequencies are used for HF ACARS. All are USB and MHZ

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HF

AIRCRAFT  FLYING  OVER  THE  ATLANTIC  ARE   PERHAPS  OF  GREATEST INTEREST  TO HF  LISTENERS  IN  IRELAND.   FOR OPERATIONAL  REASONS  CONTROL  OF  AIRCRAFT  IN  THE  NORTH  ATLANTIC  (NAT)   SYSTEM  IS  DIVIDED  UP  IN  TO  FOLLOWING  REGIONS.

 SOUTHERN  ROUTES ALL AIRCRAFT.

NAT. A                                   3016   5598   8906   13306  17946 

CENTRAL  &  NORTHERN   ROUTES FOR  AIRCRAFT REGISTERED  E OF 30W  (AMERICAN AIRLINES)

NAT. B                                 2899  5616   8864   13291   17946  

CENTRAL  &  NORTHERN   ROUTES FOR  AIRCRAFT REGISTERED  E OF 30W  (EUROPEAN  AIRLINES)

NAT. C                        2872  5649  8879  11336  13306  17946

NORTHERN   ROUTES FOR  AIRCRAFT  OUTSIDE  TRACK SYSTEM  OR  WHEN POLAR  ROUTES

NAT. D                        2971  4675  8891  11279  13291  17946

CENTRAL  ROUTES  ALL  AIRCRAFT

NAT. F                          3476  6622  8831  13291 17946

SHANWICK  ALONE  IS  NOT  THE  ONLY  HF  STATION  CONTROLLING  AIRCRAFT  WITHIN  THE NAT SYSTEM,     THE  ABOVE FREQUENCIES  ARE  SHARED  BY  MANY  OTHER  GROUND  STATIONS  IN  DIFFERENT  COUNTRIES  INCLUDING  GANDER,   NEW YORK,   SANTA MARIA,  CAMBRIDGE BAY,  REYKAJAVIK,  ALL  OF  WHICH  CAN  BE  HEARD  AT  DIFFERENT  TIMES  OF  THE  DAY.

IN ORDER  TO  AVOID  CONGESTION  ON  HF   FREQUENCIES  AT  TIMES  OF PEAK  TRAFFIC  AS  SOON  AS  AIRCRAFT  ARE  WITHIN  RANGE  OF  SHANNON COMMUNICATIONS  ARE  ESTABLISHED   AND  MAINTAINED  FOR  AS  LONG  AS  POSSIBLE  ON  VHF.  THE  TOW  FREQUENCIES  USED  FOR  THIS  ARE,  124.175 MHZ,   127.900 MHZ.  NEW 122.975 -122.400 MHZ.
                           

NEW AWAYS

AT 10W  T0 15W

122.975    137.0970   125.875

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if you wood like to help out with the FREQUENCIES send a e-mail to  IRISHAIR