Gary S. wrote:
...

If you contact the ARRL (American Radio Relay League) www.arrl.org for
your area, you may well find that there is a similar group of hams in
your area just waiting for you to ask.

This is an interesting idea, but I'm not sure it will work in my situation.
Three of the radios need to be in small referee's launches which already
contain the ref and a launch driver. Another one will be at the finish line
and a fifth will be on the dock.

I will look into this further though. Thank you.

Mitch