FATHOM Dive Systems

Effortless stability and control. The FATHOM Gemini CCR's balanced design and optimal counterlung placement makes stabilizing in otherwise challenging positions a breeze. Looking to try one out? Contact one of our approved instructors from our instructor listing here: https://www.fathomdive.com/training/

Photo by SJ Alice Bennett

No two caves are ever the same.

Some are wide and cathedral-like, others tight and unforgiving. Flow can shift, visibility can vanish, and every turn asks a different question of the diver. That’s the nature of exploration—unknown, evolving, and never repeatable.

What doesn’t change is the system you trust to take you there.

Fathom CCRs are built to be that constant. Familiar, precise, and reliable—so when everything around you is new, your equipment isn’t. It’s the platform that lets you focus on the cave, not the gear.

Because while every cave is unique, the way you explore them shouldn’t have to be.

Photo by SJ Alice Bennett

We are pleased to announce that FATHOM Mk V and Gemini CCRs are now available with HW OSTC+ handsets.

The new FATHOM Oxygen Sensors are now available!

A proven oxygen sensor with a gold plated Coax (SMB) connection. Manufactured to the highest specification for use in FATHOM CCRs.

Pick them up on through the FATHOM online store: https://www.fathomdive.com/product/fathom-ccr-sensor/

Cenote Jailhouse on the Gemini CCR, perfect day?
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Precision where it matters.
Fathom Dive Systems Gemini CCR in its element.

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FATHOM Gemini silently drifting under the Mexican Jungle.

Photo by Katherine Livins

Shearwater Firmware V103 for Petrel 3 has just been released. This update improves the accuracy of the single-point oxygen sensor calibration on most analog Petrel 3 rebreather devices. This update does not affect open circuit divers, Petrel 3 DiveCAN units, or any other Shearwater products.

For more information, read the Firmware release Notes: https://bit.ly/petrel3-v103