There's no set material for catamarans. They can be built out of just about anything, wood, plastic, metals.
Catamarans are typically constructed from a variety of materials, including fiberglass, aluminum, and wood. Fiberglass is popular for its lightweight and durability, while aluminum offers strength and resistance to corrosion. Some high-performance catamarans may also use carbon fiber for its exceptional strength-to-weight ratio. Additionally, the hulls may be reinforced with materials like foam or honeycomb for added buoyancy and structural integrity.
they do not float
Some do, most do not.
catamarans are the most popular boats
Catamarans are designed for traveling on water, specifically on seas, rivers, and lakes. They are not meant for travel on land or in the air.
Catamarans are good for sailing in shallow waters
Hobie Cats are VERY popular.
Monohull, catamarans, and trimarans.
Catamarans.
20 knots upwind, 33 knots downwind.
Average speed is about 18 knots, depending on the type, structure etc
The aztecs used catamarans , argosys and pontos marias and forlows