0 m
Sunlight Zone
Where the ocean still looks like the ocean. Photosynthesis, warmth, and the last depth a free diver will ever see.
100% surface light0 · Surface — begin descent
Built for the deepest
place on Earth.
Crewed submersibles and expeditions rated to the floor of the Mariana Trench — 10,935 metres, and back.
The company
Most of the planet is deep, dark, and cold. We build the craft that go there — and bring their crews back.
Ninety-five per cent of the ocean has never been seen by human eyes. The pressure at the bottom of the Mariana Trench would crush a nuclear submarine like a drink can — and yet, in a titanium sphere the size of a small car, two people can sit at the deepest point on Earth and look out of a window.
Hadal designs, certifies, and operates crewed submersibles for science, exploration, and record-setting descent. Every craft we fly is rated by a marine classification society, and every dive we log has ended with the crew back on deck.
10,935
Metres — deepest dive
340
Crewed dives logged
4
Submersibles in service
100%
Crew returned
The descent
Five zones between the sun and the floor
The ocean is not one place. It is a stack of worlds, each colder and darker than the last. The bar beside each zone is how much of the surface's light survives to that depth.
200 m
Twilight Zone
Colour drains to blue, then to nothing. The first animals that make their own light live here — and so does most of the ocean's fish, by weight.
22% surface light1,000 m
Midnight Zone
No sunlight reaches this far, ever. Pressure passes 100 atmospheres. Everything that glows, glows on purpose.
3% surface light4,000 m
The Abyss
A near-freezing plain that covers more of the planet than every continent combined, and that almost no one has seen.
1% surface light6,000 m
The Hadal Zone
The trenches. Named for Hades. The deepest six per cent of the ocean, reachable by a handful of craft on Earth — ours among them.
1% surface lightThe fleet
Four submersibles, four depths
From a crystal acrylic sphere for the twilight zone to a forged-titanium craft rated for the trench floor — each is built for a different slice of the deep.
Full-Ocean-Depth class
Hadal One
The flagship: a two-person titanium sphere certified to the floor of any trench on the planet, and the only craft in the fleet rated for repeat full-ocean-depth dives.
Specifications
Science class
Benthos
A three-seat science platform for the abyssal plain — twin seven-function manipulators, a sampling basket, and enough dome glass to put three scientists nose-to-nose with the seafloor.
Specifications
Expedition class
Sounder
A crystal acrylic hemisphere that puts a guest and pilot inside a 300-degree window — the craft that takes explorers, not only scientists, past the twilight zone.
Specifications
Science class
Meridian Deep
A long-endurance survey submersible for hydrothermal vents and cold seeps — twelve hours of bottom time, cameras on every axis, and a manipulator built for heat.
SpecificationsEngineering
One sphere holds the crew. Everything else is expendable.
A crewed submersible is a survival capsule wrapped in expendable machinery. The people ride inside a single forged-titanium sphere — the one part that must never fail. Around it hangs everything that can be flooded, crushed, or dropped: buoyancy foam, oil-filled thrusters, ballast, and battery.
HullForged Ti-6Al-4V personnel sphere, electron-beam welded
BuoyancySyntactic foam, rated to full ocean depth
ViewportConical borosilicate — thicker at depth, never flat
ThrustersBrushless, oil-compensated to ambient pressure
Life supportCO₂ scrubber + O₂ bleed, 96-hour reserve
BallastDroppable steel shot — surfaces on power loss
Dive log
Recent descents
Mid-Atlantic vents — 3,050 m
Meridian Deep held station over an active black smoker for eleven hours, sampling vent fluid and filming a field of tubeworms two metres tall.
Sirena Deep — 10,714 m
A twin-dive day: Hadal One reached the second-deepest point of the Mariana Trench and confirmed the depth by direct pressure gauge.
Challenger Deep — 10,935 m
Hadal One completed its fourth dive to the deepest point in the ocean, recovering three sediment cores and a new amphipod species for the Institute.
Charter
Take an expedition to the bottom of the map.
Science campaigns, film production, and record descent. Tell us the objective and the depth — our dive team designs the rest.