Production of the $4 million vessel is limited to a dozen units per year

Aston Martin is on a roll. From the Aston Martin Residences in Miami to a 37-foot AM37 powerboat, the British marque is on a rapid product diversification spree. That isn’t to say that it has relegated its core business of carmaking to second-position – Project Valkyrie, the hypercar being built in collaboration with Red Bull Racing is in its advanced stages of completion.

In the midst of a calendar that’s packed with exciting projects, Aston Martin has added another ambitious project to the list: a submarine. Currently codenamed Project Neptune, it is a joint venture between Aston Martin’s design consulting division called Aston Martin Consulting and Florida-headquartered Triton Submarines and was announced at the Monaco Yacht Show. Triton already has extensive experience in building personal submarines, most of them seat between 2-5 people and some can descend up to a depth of 7,500 feet.

Aston Martin submarine Triton Project Neptune

Project Neptune will be a 5.9-foot tall vessel capable of seating three people and diving to a depth of 1,650 feet. The limited-edition submarine is expected to be ready within a year and cost $4 million a pop. Weighing in at just under 4,000 kilos, it will also be the world’s smallest three-person sub in production once it makes its debut. The air-conditioned submersible can hit speeds of up to 3 knots underwater and is built with an acrylic bubble that allows maximum viewing pleasure for the occupants when diving.

Patrick Lahey, President of Triton Submarines said in a press statement, “We have always admired Aston Martin. The marque represents a deeply held passion for technology, engineering and timeless, elegant design,” while Aston Martin Executive Vice President and Chief Creative Officer Marek Reichman added, “Project Neptune is defined by its sleek, elegant exterior. We have used forms and proportions that express the same devotion to design, engineering and beauty that shape our cars, such as the Aston Martin Valkyrie hypercar project.”

Aston Martin and Triton are expected to build no more than a dozen of these submersibles each year, keeping up with the tradition of exclusivity that is at the core of the luxury carmaker. Case in point: It’s built only 80,000 cars in the last 100 years.

If a superyacht, a private jet, a fleet of hypercars and waterfront condos on five continents are already par for the course, getting your own personal submarine places you in the league of billionaires who aren’t posers.