A trimaran is a multihull 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.

 

 

Overall, trimarans are considered safer than a monohull as the lack of a heavy keel, combined with the two (usually sealed) amas makes for a nearly unsinkable boat. However, a trimaran can still capsize and is hard to turn upright. Because of their stability and safety, trimarans such as the Challenger class have become popular with sailors who have restricted mobility.

 

Potential buyers of trimarans should look for one that is designed with amas with multiple sealed partitions, controls that all run to the cockpit, a collision bulkhead, partial or full cockpit coverings or windshields, and drain holes in the cockpit that can adequately drain the cockpit quickly, among other things.

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