Quote:
Originally Posted by That Guy
the vhf and uhf radios i work with go a lot farther than 20 miles, but i'm not sure they're available commercial... aircraft avionics though, and the total system weight/size is pretty tiny.
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They can go farther but from a boat to boat or a boat to land the signal gets blocked. Now the taller the boat and the higher the antena will increase the distance.