2 islands, 1km apart, you have a super bright flashlight, you can broadcast your message out far and wide. the other island, it has to reply, when it can, with smoke signals in the daytime.
or, in simple terms, unless you are a high power satelight transmitter, you can’t send info back as fast as you can receive it. and you are most likely stuck sending back on copper wires.
well, this at least is how it used to work.
Latest Answers