BRIAN KAKUK'S "OH Shite Momment" When pusch virgin line in an underwater fracture cave. AT 320 ft, the big boulders start to fall.

This extended episode of Pod Diver Radio goes deep into the world of blue holes, caves, and serious life-support gear—perfect listening if you're a freediver dreaming of Bahamas sinkholes or a tech diver gearing up for expedition dives. We kick off with news from Divers Alert Network (DAN): details on the upcoming DAN Technical Diving Conference in Durham, NC, featuring Dr. Richard Vann on hyperbaric science, Dr. Peter Denoble on accident prevention and expedition planning, plus wreck and cave sessions with Jon & Richie and GUE's Jared Yablonski. Then we head to Abaco, Bahamas, where Joe sits down with cave explorer and instructor Brian Kakuk of Bahamas Underground. They break down: Iconic systems like Dan's Cave, the Badlands, and Ralph's Sink Crystal-white formations, "Crystal Palace" rooms, and crocodile & tortoise fossils preserved in hydrogen sulfide layers Ocean caves like Reel Breaker: tidal flow, dense sponge gardens, lobsters deep in the dark, and bioprospecting potential Why Brian teaches cave diving primarily in sidemount, and how Abaco today feels like "Mexico in the '70s" for explorers In the final segment, Dive Rite In-Depth looks at the Hurricane regulator in real-world cold-water conditions at Dutch Springs, during work-up dives for the U-869. Joe talks hose routing, compact cold-water first stages, deep stops, and how the Hurricane breathes side-by-side against his older reg at ~90 ft / 47°F. If you're into freediving blue holes, cave exploration, or just want to understand the environments and gear that push the limits of underwater exploration, this long-form episode is packed with ideas, stories, and tech talk.

PD77: 1. We speak with Jill Heinerth about not diving the U-869 and August giveaway of her DVD "Waters Journey" www.intotheplanet.com 2. Interviews with British Deep Shipwreck Diver Leah Cunningham and his finding a new shipwreck at 420 fsw. Then a 3. DIVE RITE In Depth."review a Dive Rite Regulators and 4. review of "Playa International Clinic" and the Re-compression Chamber in Mexico's Rivera Maya LISTEN TO AUDIO HERE

Cave Diving in Abaco Bahamas with Brian Kakuk.

SHOW NOTES 1. "Live" from ABACO BAHAMAS, report from the island. Also, review of book "Scuba Diver Safety" by Dan Orr. 2. Abaco Dive Adventures: Interview with Tim Higgs. 3. PADI, Specialty course "Cavern Diver" 4. DIVE RITE In Depth." Review of the new regulator, the Hurricane. 5. "Oh Shit Moment" Brian Kakuk talks about the fun life of a Navy Diver. LISTEN AND DOWNLOAD AUDIO HERE

In this extended cave-centric episode of Pod Diver Radio, we bounce from Mexico to Georgia to Cuba and the Bahamas with a stack of stories cave divers will recognize immediately. We start with a trip report from Angelita and Gran Cenote with cavern guide Stephan of Yucatec Divers. He walks us through the surreal hydrosulfide cloud at ~100 ft, the halocline, and the island of dead trees rising out of the "cloud," then over to stunning speleothems and daylight-filled passages at Gran Cenote. Stephan breaks down how guided cavern tours work, what the limits are for open water divers, and how these dives often become the gateway drug to full cave training. Next up is the first installment of our new "Oh Shit Moment" series: Lamar Hires (Dive Rite) shares a multi-diver incident in Ellison's Cave, Georgia—a broken line in a sump, no safety reel, low gas, missing pack, and the very real possibility of a trapped body blocking the only way out. It's a detailed, honest walk-through of decision making, gas limitations (single 72s with Y-valves), and how cave teams deal with compounding failures when "we are who they would call." Joe also talks training and gear: how he teaches the PADI Deep Diver specialty as a stepping stone toward tech and cave, why he loves aluminum 72s as stage/deco bottles, and a call-out to help kick off a new AL72 production run. We preview an upcoming Abaco, Bahamas cave diving trip, plus a special Jill Heinerth event and wreck day on U-869 off New Jersey with Jill, Richie Kohler, and John Chatterton. Finally, we switch gears with Matt from ProTec describing Spanish-American War wrecks off Cuba—wrecks so intact you can spot one of them on Google Earth. If you're into cenotes, cave incidents, stage bottles, and future cave trips, this long-form episode is built for you

Interviews w/ Captain Martin Bayerle about the search for gold on-board the RMS Republic and Dean Fessler of the Shark Research Institute: PD73: Sound Scene Tour of the New Jersey Historical Diving Assoc. : Shipwreck Symposium. (Joe recounts working on the RMS Republic documentary with Captain Bayerle way back in 1989)

1. YUCATEK Dive Center. Playa del Carmem, Q-Roo, Mexico 2. DAN Tech Tips Dr. Richard Vann. (Oxygen Toxcity) 3. GUE Cave 1 Program. DOWNLOAD AUDIO HERE

In this DAN Tech Time episode of Pod Diver Radio, host Joe Cocozza sits down with Dr. Richard Vann to break down HPNS—High Pressure Nervous Syndrome—for serious technical divers. They unpack what HPNS actually is, why it's pressure (not helium) driven, and how enzyme distortion at extreme depth leads to tremors, sleep disruption, loss of appetite, and even psychosis on very deep dives. Dr. Vann also explains why HPNS starts to show up around 600 ft / 180 m, why rapid "bounce" dives make tech divers more vulnerable than saturation teams, and how adding narcotic gases like nitrogen or hydrogen can partially counteract HPNS on deep helium dives. If you're planning extreme trimix, dreaming about 500+ ft cave or wreck dives, or just want to understand the real science behind The Abyss, this episode is your deep-physics briefing on HPNS, helium, and ultra-deep decompression strategy.