The Spektrum S-Series receivers, designed for cars and trucks, are not ideal for boats. I've been able to successfully used the SR3100 in several boats without issue, but many people have not had such good luck.
If you are running boats, you should be running the MR-series RXs (MR3000 or MR200). The marine series uses a different protocol than the surface series, and has a MUCH longer range (out of eyeshot, in most cases.)
Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."
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