[5] The Lagoon 51 is a recreational catamaran, built predominantly of vacuum infused polyester fiberglass, with wood trim.
The hulls have plumb stems, extended reverse transoms with swimming platforms, a central dinghy lift, dual internally mounted spade-type rudders controlled by a wheel on a flying bridge and twin fixed fin keels.
[1][3] The boat is fitted with twin Japanese Yanmar 4JH80 diesel engines of 80 hp (60 kW) for docking and maneuvering.
[3] In a 2022 Yacht Style review, Francois Tregouet wrote, "eventually, the wind picked up as we got in sight of the Pyrenees and it was time to hoist the sails.
A little trip onto the bimini to help the battens clear the lazy jacks indicates that a less perilous solution needs to be found ... Halyards and sheets all come back to the central helm station with the optional electric winches.