About this page.

RadioFax broadcasts are still a valuable source of weather information.


Preamble

This page may remind those who vaguely remember the long lamented Bracknell GFA broadcast. Following the discontinuation of GFA, the Royal Navy enhanced its transmissions from Northwood - GYA. This page lists the Marine content of the Northwood schedule and adds some comments. There are pages on history and a summary of the need for Radio Fax elsewhere on this site A separate page deals with reception problems.



Related pages

On this page -

RadioFax Reception

There are some dedicated equipments available but, usually, most people use a standard HF/SSB receiver and a laptop. The NASA HF3 is a very cheap set that does a good enough job for most needs although it may need more careful tuning than more expensive sets, The Sony CF-SW7600GR is a good radio

There is ow an Tablet decoder app that can work simply using the sound from the radio,

As the future is in some doubt, it may be the most sensible buy. For software, there are several packages around such as Mscan or JVcomm.


Northwood Radio Fax - GYA

Although a RN broadcast, the charts are from the UK Met Office.

There are some unsatisfactory features that may get rectified in time. First, as a power saving measure, the transmitters are switched off between charts. Thus there is no tuning signal prior to the start of a broadcast. This will create difficulties when receiving charts around dawn and dusk since, at these times, the optimum frequency can change quickly due to rapid changes in the characteristics of the ionosphere.

Secondly, the chart headings are difficult to read. It will be necessary to refer to the schedule to know what chart is being received. Third, because much of the output is computer generated, the lines tend to be rather thin and not too easy to see.

The highest frequency now used by Northwood is 11086.5 KHZ. This limits the day time range for good reception by yachts that are unlikely to have optimum aerial configurations.

NOTE
The schedule below is of those transmissions likely to be of use to leisure and professional sailors. Some transmissions are for the use of Naval aircraft and submarines but of no interest to the sailor.

NORTHWOOD Schedule

Area_: North Atlantic and Mediterranean

Full details of frequencies, call signs and schedules can be found at the WMO site.

DWD Radio Fax

The Deutscher Wetterdienst (DWD) provides a RadioFax service as a contribution to the GMDSS. How long this service will continue is uncertain. The technology is obsolescent and it will probably be replaced by a satellite

space based system within the next 5 - 10 years. Schedules, frequencies and call signs are at the DWD radio-fax broadcast schedules link.

Worldwwide

Most use ful is the

Also useful is the

Although "old tyechnology" radio fax is still a useful service capable of reception over large areas. See my page on HF reception problems.


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