This article is from the Boats FAQ, by John F. Hughes with numerous contributions by others.
This topic arises about three times a year. The usual proposal is a split
along power/sail lines. Each time the concensus, with a growing number
of dissenters, is that (a) much of what is discussed here would be
crossposted to rec.boats.sail and rec.boats.power if they both existed, (b)
many topics, like maintenance, moorings, coast guard regs, boat shows,
the grounding of the QEII, large oil spills, etc., are of (passing) interest to
almost anyone who goes out on the water, (c) we all learn something
about the folks with whom we share the water by reading what they have
to say, (d) the volume of postings is rapidly increasing and is growing too
large, but a power/sail split will not necessarily address this.
Recently rec.boats.racing and rec.boats.building have been formed, and
they seem quite successful; I personally attribute their success to the lack
of overlap in interests between the folks in those groups and "the rest of
Analysis of the traffic on rec.boats suggests that between 1 and 10 percent
of the traffic is devoted to discussions of splitting. All such discussion
should take place in (or at least route followups to) news.groups.