The Research Vessel Triton is a trimaran vessel owned by Gardline Marine Sciences Limited and a former prototype British warship demonstrator for the UK's Defence Evaluation and Research Agency. She was built as a technology demonstrator ship for the Royal Navy's Future Surface Combatant, and has been used to both prove the viability of the hull-form and as a trials platform for other QinetiQ innovations. The ship was used by the Australian Border Force's Marine Unit, and was for a time moored in the River Fal near the King Harry chain ferry. Up until July 2019 she was moored on the River Yare, Great Yarmouth in Norfolk, England.

A trimaran is a multihull boat that comprises a main hull and two smaller outrigger hulls which are attached to the main hull with lateral beams. Most modern trimarans are sailing yachts designed for recreation or racing; others are ferries or warships. They originated from the traditional double-outrigger hulls of the Austronesian cultures of Maritime Southeast Asia; particularly in the Philippines and Eastern Indonesia, where it remains the dominant hull design of traditional fishing boats. Double-outriggers are derived from the older catamaran and single-outrigger boat designs.