The Bahamas Caves Research Foundation has a long history with exploration, film and safety diving work at the famous Dean's Blue Hole located on Long Island, The Bahamas. This oceanic blue hole was first dived to the bottom by cave diver Jim King in 1992 to a staggering depth of 663 feet (202 meters).
During his time at Dean's Blue Hole, he and his time located passages running off of the main blue hole at a depth of 150 feet (45 meters). Due to the use of back mounted cylinders and passage size, his team was limited in the distance they could achieve in these passages, leaving these for future explorers in different configurations.
This is where Brian Kakuk and the Bahamas Caves Research Foundation took up the challenge. Over several years and trips to Long Island, we were able to explore and map the upper-level caves well into new territory using custom, side mounted rebreather configurations supplied by KISS Rebreathers.
New rooms, passages and the location and extent of these passages has now been discovered. The BCRF intends to do more work at this site, studying the tides, marine life and eventually spending enough time down deep at the site to conduct more detailed study of life at the bottom of Dean's Blue Hole.
You can see first-person exploration video at Dean's Blue Hole here:
Cave passages plotted using Ariane's Line Software and Mnemo mapping device