Common boat designs are a catamaran with two pontoons, or a trimaran with three.
From the en.wikipedia.org
The huge, baseball-diamond-size trimaran USA-17 won the America's Cup a year ago.
From the sfgate.com
However, it's unlikely Peyron could have done much to stop the powerful trimaran.
From the charlotteobserver.com
Its radical trimaran was the fastest boat in the history of the America's Cup.
From the usatoday.com
Some modern proa designers have borrowed trimaran design elements for use in proas.
From the en.wikipedia.org
He's helmed an even bigger trimaran that Oracle used to win the last America's Cup.
From the sfgate.com
Alinghi has built a 100-foot catamaran and BMW-Oracle a 100-foot trimaran.
From the freep.com
Spithill, however, had slightly overcooked and he stalled the big trimaran.
From the guardian.co.uk
The Americans say the Swiss want that provision in order to disqualify Ellison's trimaran.
From the usatoday.com
More examples
A fast sailboat with 3 parallel hulls
A trimaran is a multihulled boat consisting of a main hull (vaka) and two smaller outrigger hulls (amas), attached to the main hull with lateral struts (akas). The design and names for the trimaran components are derived from the original proa constructed by native Pacific Islanders.
(Trimarans) A vessel with three hulls, with the center hull larger than the outside hulls.
A three hull boat with no centreboard. Usually used by disabled people or for the paralympics
A boat with a center hull and two smaller outer hulls called amas. Also see catamaran and monohull.
A type of boat with three side-by-side hulls, the center of which is usually larger with crew accommodations.
A catamaran with three hulls designed by someone who can't decide where to put a single engine;