With motorcycles, there is no verbal communication, regardless of proximity. So we use hand signals. Works just fine, once the parties arrive at a standard for the meanings. You could go with various radios, but I personally don't like them. Part of what I like about things like motorcycles and kayaks is the lack of speaking.

> When my wife and I paddle, we try to stay together, but inevitably we get
> separated. It's not just due to different paddling strengths. My wife
> usually spends more time looking around enjoying the scenery than I do.
> Once separated, even for small distances, it's hard to communicate. I've
> thought of buying a couple FRS radios with VOX capabilities, but I haven't
> found any that are waterproof. Anyone else solved this problem?