Hyperbaric chambers at dive centers serve a specific use. They treat the bends, gas embolism, and other dive injuries. This is real diving medicine with set protocols and an active emergency network. See the arterial gas embolism evidence atlas for the full study-by-study evidence breakdown.
This is a different product from wellness HBOT. The chambers are larger and run higher pressures. They connect to a national emergency system.
Confusing the two is a common source of patient questions.
This guide makes the distinction clear.
What a dive center chamber actually is
Dive center chambers are typically multiplace recompression chambers. They run at 2.4 to 6.0 ATA based on the protocol. That is far above the 2.0 to 3.0 ATA range used in wound centers.
The chambers seat several patients plus an attendant. Direct medical care happens inside. They are built for diving emergencies first; elective HBOT is secondary.
Maker names include Perry Baromedical (Sigma MP and Sigma Plus II), ETC Biomedical, Healing Chambers International, plus international brands. Sechrist Industries is rare in multiplace but common in monoplace. The openFDA 510(k) database (2024) lists the cleared models.
Emergency indications — what dive center chambers were built for
Two diving emergencies dominate.
Decompression sickness (the bends). Nitrogen bubbles form in tissue and blood after a diver surfaces too quickly.
Treatment follows the US Navy Treatment Tables (2024). Tables 5, 6, and 6A are the most common.
Pressures reach 2.8 ATA on Table 6. Table 6A reaches 6.0 ATA.
Arterial gas embolism. Gas bubbles enter the arterial circulation. The cause is often rapid ascent or lung barotrauma; protocols are similar to severe decompression sickness.
Both are FDA-approved HBOT uses in the Medicare HBOT coverage policy (2024). Both need pressures soft-shell wellness chambers cannot reach.
Other diving emergencies treated include severe CO poisoning, certain crush injuries, and gas gangrene with diving origins. See the gas gangrene evidence atlas for the full study-by-study evidence breakdown.
The DAN coordination role
The Divers Alert Network (DAN) (2024) is the US diving emergency coordination group. DAN runs a 24-hour hotline and works with chambers nationwide.
When a diving emergency occurs, the typical chain is:
- The diver or diving partner calls DAN
- DAN assesses the case and finds the nearest open chamber
- DAN coordinates with the chamber's on-call medical team
- The diver is moved to the chamber for treatment
DAN's network includes academic centers, military chambers, and dive center chambers. The network maps to where divers go — coastal cities, Hawaii, Florida, the Gulf Coast, and Caribbean territories.
Where US emergency chambers actually are
Multiplace chambers cluster in regions with active diving:
- Florida (Pompano Beach, Miami, the Keys, Pensacola)
- California (San Diego, Catalina, San Francisco Bay)
- Hawaii (Honolulu, Hilo)
- US Virgin Islands and Puerto Rico
- Gulf Coast (Galveston, New Orleans)
- Northeast academic centers (Boston, NYC, Philadelphia)
- Naval hospital chambers (San Diego, Norfolk, Travis AFB)
David Grant USAF Medical Center at Travis AFB in California holds UHMS accreditation with distinction (2024). It is one of two California facilities at that tier.
For divers traveling to dive sites, knowing the closest open chamber is part of standard trip planning. DAN's chamber directory is the source of truth.
Elective HBOT at dive centers
Some dive center chambers also offer elective HBOT for the 14 FDA-approved uses. This is a secondary use. The chamber's primary role is emergency response.
When a dive center chamber offers elective HBOT, the program looks similar to a hospital wound center.
- UHMS accreditation in most cases
- CHT-certified operators
- Medical director with hyperbaric training
- Sessions at 2.0 to 3.0 ATA on 100% oxygen
- Insurance billing for FDA-approved indications
The chamber capabilities span both emergency and elective use because multiplace chambers run higher pressures than wound center monoplace chambers.
What dive center chambers are not
Dive center chambers are not wellness HBOT chambers. The wellness marketing — soft-shell 1.3 ATA, cognitive recovery, longevity — is not what dive center chambers do.
The pressure and dose differ a lot. The Mychaskiw 2014 review (2014) on dose-response frames the gap. 1.3 ATA wellness sessions are far below 2.4 to 6.0 ATA dive treatment.
A diver with a dive injury needs a dive center chamber. A non-diver after wellness HBOT goes to a soft-shell clinic. The two paths do not overlap.
How to find your nearest operational dive chamber
For trip planning:
- The DAN chamber directory (2024) is the primary US source
- The UHMS facility directory (2024) lists accredited centers
- Local dive shops often know the regional chamber status
For active emergencies:
- Call DAN at +1-919-684-9111 (24-hour line)
- US Coast Guard for vessel-based dive emergencies
- 911 for any acute dive injury
Chamber availability changes. Not all listed chambers are open at all times. The DAN line is the source of truth.
Insurance coverage for diving emergencies
Decompression sickness and arterial gas embolism are FDA-approved HBOT uses. Medicare and most private insurance cover them. Insurance verification happens during or after the emergency.
For divers without insurance, DAN memberships provide evacuation and chamber coverage. Many diving certification groups require or recommend DAN membership.
Out-of-network and emergency transport costs can be large. DAN plus health insurance covers most cases.
The safety dimension
Recompression chambers carry the same risks as other hyperbaric chambers. Fire risk, oxygen toxicity, and pressure complications all apply. Risks scale with pressure, and diving protocols reach higher pressures than elective HBOT.
The 1997 Milan chamber fire (1998) killed 11 people in a hard chamber. Fire risk applies to recompression chambers too.
Operator training and fire safety matter more at higher pressures. Multiplace chambers add risk because staff are inside with patients.
Related reading
- Wound care center HBOT vs wellness clinic HBOT
- Monoplace vs multiplace HBOT chambers: which is better
- The complete 2026 HBOT chamber buyer's guide
- UHMS-accredited HBOT facilities: what certification means
Frequently asked questions
Can I get elective HBOT at a dive center chamber?
Some dive center chambers offer elective HBOT for FDA-approved uses. Coverage and access vary by facility. Some are dedicated to emergency response; others run both programs. Call ahead to verify the elective program is active and whether it is UHMS-accredited.
What is the difference between a recompression chamber and a hyperbaric chamber?
Functionally the same gear for different uses. "Recompression chamber" is the term in diving medicine for chambers used to treat decompression sickness. "Hyperbaric chamber" is the broader term for chambers used for any use. The gear is similar; the use case and pressure protocols differ.
How fast do I need to get to a chamber after a diving injury?
For decompression sickness and arterial gas embolism, faster is better. Best outcomes typically come within 6 hours of symptom onset. Treatment remains useful for 24 hours or more. DAN coordinates the fastest chamber response.
Are dive center chambers UHMS-accredited?
Many are. UHMS accreditation requires the chamber meet current safety standards, operator training, and medical director oversight. The accreditation is one quality signal among several. The chamber's emergency response and DAN status are also relevant.
Can a wellness clinic treat decompression sickness?
No. Wellness clinic soft-shell chambers run at 1.3 ATA. Decompression sickness treatment requires 2.4 to 6.0 ATA pressures available only in hard-shell multiplace chambers. A diver with suspected decompression sickness needs an emergency dive center chamber, not a wellness clinic.
Medical disclaimer
This article is for informational purposes only and is not medical advice. Diving injuries are medical emergencies that need hyperbaric care. Call DAN at +1-919-684-9111 for active diving emergencies. Chamber status changes — verify through DAN and the UHMS directory.
-- The HBOT Finder Team