The most extreme superyacht concepts in the world

Standout feature: hybrid superyacht-submarine engineering

Believing in the future of "submersibles" as a new category of private vessels, Migaloo PSY had designed a superyacht able to function underwater for approximately four weeks. The 165.8-metre can accommodate between 14-20 guests and 32-40 crew, dependent on the owners' preference in ratio. Leisure highlights include a 200-square-metre spa, an outdoor cinema and a helipad. There are also two "Midget Submarines" on hand for deep sea exploration, while a 12.5-metre limousine tender and two expedition vehicles facilitate adventures on the surface.

Extreme feature: asymmetric decks and its own personal port

Milan-based designer Enzo Manca is the mind behind this curved, military-style concept, designed "with the idea it should become the official flagship mega yacht of the [UAE]." UAE One was conceived with input from a Sheikh, with a focus on privacy and additional space for international meetings, as well as multiple transfer options, including a "mini-internal port" for tenders and a submarine. The 140-metre vessel also houses a spa, wellness centre and 18-metre swimming pool that sits transversely on the sundeck.

Extreme feature: able to "fly" at exhilarating speeds

Plectrum is a 'flying' yacht concept that takes inspiration from the more contemporary America’s Cup sailboats - specifically the Luna Rossa design - and would be the largest example of foiling technology installed on a yacht. Designed by Lazzarini Design Studio, the yacht would have an eye-watering top speed of 75 knots thanks to three hydrogen-powered motors, capable of 5,000hp each. Plectrum is also envisioned with an adjustable beam of up to 20 metres that can be reduced to 15 metres when the yacht is berthed or at anchor.

Extreme feature: an experimental take on an open-plan layout

Rob Doyle Design and Van Geest Design collaborated to present Domus, a 40-metre sailing trimaran with an interior volume that rivals a 60-metre motor yacht. The word Domus means a single-storey house built around an atrium, with many rooms opening up off the central atrium. The yacht borrows aspects of this design to create a lofty, open feeling on board. With the aim to become the first truly zero-emission yacht over 750GT, Domus will be able to heel at an angle of two degrees, also ensuring a comfortable cruise with minimal rolling. Amenities include a cinema room, gym and saloon with a bar and also hosts a spa area with a swimming pool. Alongside the 40-metre concept, the design duo are working on a larger version of the concept.