Morgans wrote:

You are missing the technical definition of a keel boat. Tri hulls and
Catamarans are not keelboats. Deep displacement sailboats without moveable
centerboards are keel boats.

I kneaux that, you and Dave are missing the irony of my point. I seem to
remember the Kiwi's bringing their supersized keel boat to a race here
in the US quite awhile back and losing to a 2 hulled blow boat that
allows one side to fly [somewhat back on topic] when the winds are
sufficient...

Hence more hulls in this race, wins by design...

Most every boat hull has a "keel", some just geaux deeper in the water
than others... A Louisiana Jon Boat [flatbottom] comes to mind... g