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Research

U.S. Deep Caving Team

United States USDCT, United States Deep Caving Team

An exploration organisation founded in 1980 by Bill Stone that runs long expeditions to deep caves and develops exploration technology; it led the 1987 Wakulla Springs Project and the 1998 Wakulla 2 mapping expedition.

Official website ↗

The U.S. Deep Caving Team says it was founded in 1980 by explorer and engineer Bill Stone to explore and study remote frontiers and to develop the technology needed to reach them. Its early work focused on very deep air-filled caves in southern Mexico, where flooded sections (sumps) forced the team to develop lightweight diving equipment and, from 1987, rebreathers [1].

The team's two Florida projects are landmarks in underwater cave science. The 1987 Wakulla Springs Project, which began on 1987-10-24, used a portable underwater habitat for decompression and surveyed about 3,300 m of tunnels while testing the Cis-Lunar MK1 rebreather [2]. The 1998 Wakulla 2 expedition built a Digital Wall Mapper, a scooter-mounted sonar and inertial device intended to produce three-dimensional maps of the cave walls instead of a simple line survey [3]. The team publishes expedition summaries and maps on its website.

Further reading

A short history of underwater cave exploration: dated milestones

Dated, sourced milestones in underwater cave exploration: Florida's pioneers and Sheck Exley, the 1987 and 1998...
8 min read

Archaeology and palaeontology in underwater caves

Why flooded caves preserve Ice Age evidence, and what has been found: Naia and the extinct fauna of Hoyo Negro,...
8 min read

How underwater caves are surveyed and studied

An introduction to underwater cave survey: line surveys with stations, distance, compass bearing and depth; why...
7 min read

Beyond the Deep: The Deadly Descent into the World's Most Treacherous Cave ↗

Two members of a 44-person expedition to the Huautla cave complex in Mexico describe how, after a diver's...
Book

The Wakulla Springs Project ↗

Expedition summary of the 1987 Wakulla Springs Project: team, objectives, the underwater habitat,...
Book

U.S. Deep Caving Team ↗

A non-profit devoted to exploring the planet's remaining frontiers and building the technology to do it....
Survey project
Sources: [1] U.S. Deep Caving Team ↗[2] U.S. Deep Caving Team ↗[3] U.S. Deep Caving Team ↗ · checked 2026-10-14
Every fact on this page, with its source (3)
FactStatusSource
The USDCT was founded in 1980 by Bill Stone.Self-reported. Verified [1]
The 1987 Wakulla Springs expedition departed on 1987-10-24 and explored and surveyed about 3,300 m of tunnels. Verified [2]
A Digital Wall Mapper with 32 sonar transducers and an inertial reference unit was developed for the 1998 Wakulla 2 project. Verified [3]

Verified: stated by an official or primary source we opened. Reported: from a secondary source only. Sources conflict: the note gives both versions. May be out of date: the newest source we found is old.

Written in our own words from the sources above. Report a correction

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