A Trimaran is a boat with three hulls.
A trimaran has 3 hulls, a main hull and two smaller outrigger hulls.
Boat hulls are currently usually made of fiber glass. Fiber glass is the cheapest, most effective material. Boat hulls can also be made of wood, carbon fiber, and steel.
This type of boat is called a Catamaran.
A trimaran is a sailing yacht with three parallel hulls.
Catamaran.
4
Trimaran
4
Tri-hull
a 2 hull boat
There's no law against it, but it will slow your boat down.