APRS

 

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APRS
Amateur TV
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Digital Radio
HF
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LF & VLF
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Mods
Oddments
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RSGB, etc.
Satellites, etc.
Software
Used Gear
VHF/ UHF & EME

NB There are a number of software apps for the iPhone and iPad, such as Ham Tracker, Ham Dashboard and iBCNU, as well as a variety of files for Android which work well and mean you don't need a radio to transmit your position via APRS (possibly useful if you also want to use 2 metres for speech).