
World first: Triton Submarines has delivered the first six-person acrylic-hulled sub with the world's largest transparent, spherical passenger compartment.

Deep dives: Fitted with a 360-degree window, the Triton 3300/6 has a certified depth rating of 1,000 meters.

Major milestone: "It's a very exciting development, because we've now proven that we can produce vehicles that will carry six people to 1,000 meters," says Patrick Lahey, president of Triton Submarines.

Vanishing vessel: The sub's Tiffany blue exterior -- specially requested by its owner -- "appears to disappear" once underwater.

Game-changing move: The $5.5 million vessel, described as "a salon under the sea," provides an immersive underwater view for those on board.

Ocean exploration: The air-conditioned sub has a top speed of three knots and enough air and battery for undersea excursions lasting over 10 hours.

Growing demand: An increasing amount of mega-yacht owners are seeking out subs as a means of entertaining family and friends while at sea.


