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Non Radio covert communications

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Non Radio covert communications
20 August 2013, 17:41,
#13
Lightspeed Offline
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RE: Non Radio covert communications
I've made a little search on audi modulated laser beams. Current distance record is over 100 miles.

But this still does not come close to the heliograph distance record of 183 miles that was set in 1896!
72 de

Lightspeed
26-SUKer-17

26-TM-580

STATUS: Bugged-In at the Bug-Out
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Messages In This Thread
Non Radio covert communications - by Lightspeed - 20 August 2013, 07:59
RE: Non Radio covert communications - by Highlander - 20 August 2013, 08:06
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 08:42
RE: Non Radio covert communications - by bigpaul - 20 August 2013, 10:58
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 11:58
RE: Non Radio covert communications - by Prepper1 - 20 August 2013, 11:25
RE: Non Radio covert communications - by I-K-E - 20 August 2013, 14:01
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 14:20
RE: Non Radio covert communications - by Highlander - 20 August 2013, 14:50
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 14:55
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 17:41
RE: Non Radio covert communications - by Steve - 20 August 2013, 18:55
RE: Non Radio covert communications - by Lightspeed - 21 August 2013, 12:06
RE: Non Radio covert communications - by Lightspeed - 25 August 2013, 06:57
RE: Non Radio covert communications - by Highlander - 26 August 2013, 18:22
RE: Non Radio covert communications - by Jonas - 25 August 2013, 17:55
RE: Non Radio covert communications - by Lightspeed - 26 August 2013, 19:38
RE: Non Radio covert communications - by Mortblanc - 28 August 2013, 20:21
RE: Non Radio covert communications - by Lightspeed - 28 August 2013, 21:51
RE: Non Radio covert communications - by Mortblanc - 30 August 2013, 18:29
RE: Non Radio covert communications - by Midnitemo - 30 August 2013, 18:35
RE: Non Radio covert communications - by Midnitemo - 30 August 2013, 11:37
RE: Non Radio covert communications - by Lightspeed - 30 August 2013, 11:42

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