MGB 81, a historic Royal Navy Motor Gun Boat, likely operating in Portsmouth. MGB 81 is a 71.5ft Motor Gun Boat and was among the fastest of its type during its service. It is the only restored and operational example of a Royal Navy Coastal Forces MGB that saw active service in World War II. The vessel was launched on June 26, 1942, as part of a batch of ten boats ordered from the British Powerboat Company. MGB 81 is known for its chine hull form, featuring double-diagonal mahogany sides and a triple diagonal mahogany bottom.

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