I'd like to use GMRS radios to run a rowing regatta (in the U.S.).
These require an FCC license but the GMRS license
(http://wireless.fcc.gov/services/per...generalmobile/) is limited
to an individual and members of his household and relatives.
While I agree with others that it would be an excellent idea to get the
local amateur radio organization to provide (free) communications for your
regatta, I wonder why you hadn't also considered the FRS radio system?
No license, cheap equipment, and should be able to provide your
communications requirements for a regatta, assuming you don't have hills or
other obstructions to talk past.
Ed