"Michael" wrote in message news:3H7tc.55379$
I got to thinking, that if it is going to be wireless and underwater, it's
probably going to use longwave to transmit. I've read countless times
that
long wave is used underwater by subs and underwater research.

LF or Long waves around 150 kHz are attenuated very quickly in water that's
why to communicate with a submarine you need to go to the ELF band where
subs use 76 Hz , yes 76 Hertz! You would not be able to get a speech
transmission let alone TV pictures on 76Hz, so I don't know what these bots
are going to do. I heard they were going to be wired up anyway.

--
Simon Mason
Anlaby
East Yorkshire.
53°44'N 0°26'W
http://www.simonmason.karoo.net