"Michael A. Terrell" wrote in message
m...



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After all this time, I've only just noticed that there is an error in the
text of this article. In the caption it states that it has a listening
radius of 1700 meters. Now, unless the British have a different use for the
word 'radius', and assuming that the story is correct about the receivable
wavelengths, then I figure they must have meant that the radio was capable
of receiving signals of up to 1700 meters in wavelength.