Average speed is about 18 knots, depending on the type, structure etc
20 knots upwind, 33 knots downwind.
There's no set material for catamarans. They can be built out of just about anything, wood, plastic, metals.
they do not float
Some do, most do not.
catamarans are the most popular boats
Hobie Cats are VERY popular.
Monohull, catamarans, and trimarans.
Catamarans are good for sailing in shallow waters
Catamarans.
Sea. It's a type of boat.
Usually fiberglass or wood, but there are catamarans whose hulls are constructed of cement.
The aztecs used catamarans , argosys and pontos marias and forlows