4 ms·
It will be interesting to see whether use of these stations declines over the next few decades. Surely global adoption of the internet has made it the easiest p
by blackswan 16y ago
It will be interesting to see whether use of these stations declines over the next few decades. Surely global adoption of the internet has made it the easiest place to hide clandestine communication?
- rlpb 16y agoIt's a question of where connectivity is available and how easy it is to track. For example, how do you replace a submarine surfacing somewhere to receive a pre-scheduled radio transmission?
- ruslan 16y agoThey use VLF/ELF to send "message pending" and/or some other very short predefined signals. Russian military transmitter (ZEVS) is still operating on 82Hz frequency and uses Earth as an antenna. http://en.wikipedia.org/wiki/Extremely_low_frequency http://en.wikipedia.org/wiki/Extremely_low_frequency