Crewed submersible expeditions
Descents to 4,000 metres, into the largest and least-seen living space on Earth.
More people have walked on the Moon than have reached the ocean's deepest floor. We charter the descent: pilot, pressure sphere, and four kilometres of falling dark.
Dive log · −200 M
Where sunlight surrenders
Two hundred metres down, the last blue light gives out. From here every glow you see is made by something alive.
The sea writes in light
Dive log · −1,000 M
No sun has ever reached this water
In the midnight zone your floodlights are the first daylight in four billion years. Something is always watching them.
MOVE YOUR LIGHT ACROSS THE DARK
DSV Halcyon
A three-person pressure sphere with a 180-degree acrylic viewport, rated well past the deepest point on any of our routes.
m depth rating
acrylic viewport
life support at depth
guests per pilot
2027 season
Three descents
The seafloor at four kilometres is still being built: fresh rock, boiling springs, and animals that have never needed the sun.
Go where sunlight
has never been.
Six guests per season. Expeditions depart from Horta, Ponta Delgada and Monterey.