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Testing Your New Setup


Instead of hunting for readable signals, check out the following links for schedules, along with easy targets to tune. Please read them carefully to see if the software you are using is compatible.

This list is nowhere near all-inclusive; additions are solicited.


ALE (a.k.a MIL-STD-188-141A)

Probably one of the fastest growing modes in terms of number of users, it's hard to think that any of these lists are complete, but should serve to get you started.

  • Our COTHEN article has information on hearing this Customs network, dedicated to drug interdiction
  • Utility Planet ALE Frequency List
  • The 2015 Digital Digest has information on the US Air Force Global HF ALE Network - see the HF Appendix for the link to this document, which is very inexpensive.


SITOR-B (NAVTEX) Broadcasts

There are a number of stations that use this mode for news, weather and other information. Some have specific schedules.

  • HF SITOR Broadcasts by William Hepburn
  • NAVTEX schedules (via PC NAVTEX website)
  • NAVTEX Broadcasts by William Hepburn
  • USCG Sitor-B Broadcasts
  • There have been a few reports of Shipcom LLC (owner of station WLO Mobile Alabama) sending RTTY (45/170) and SITOR-B weather on 4213 and 8473 Khz running 24h.
  • SVO Athens Greece is known to send news bulletins and exchange rates using SITOR-B at varous times. Frequencies include 8424.0 and 16830.5
  • During local evenings, you can hear Digital Selective Calling (DSC) on the frequency of 2187.5. Marine Safety Information (MSI) broadcasts can be heard on 4209.5, using SITOR-B. Other freequencies to check (subject to propagation and local conditions) would include 6312, 8414.5, 12577 and 16804.5 kHz.


Other Modes




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