Hi Dan,

You do not need to worry, I am pretty certain. All the fast electric guys create huge, 6' tall walls of water behind their boats and do not have a RF problem. And, the Tactic radio receivers (Futaba design) have no antenna at all and all the Aquacraft FE boats come with those Tactic receivers.

I would think you would be completely safe to hide the antennae under the deck all together, which is what I do. And also with 2.4Ghz radios, if it loses range the failsafe just shuts everything off. No powered run aways.