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Announcing Rebreather Forum 4



20-22 April, 2023 Valletta, Malta

Greetings Researchers and Diving Professionals,

We are pleased to announce that we will be holding Rebreather Forum 4 (RF4), Thursday through Saturday, 20-22 April 2023 at the old University of Malta campus in Valletta, Malta, sponsored by DAN Europe, DAN, PADI and Heritage Malta. The purpose of the scientific and trade-only meeting is to advance the diving community’s state of knowledge regarding rebreather technology and its uses, with the goal of improving rebreather diving safety and performance. 

We plan to hold a Non-Caustic Cocktail Reception on Wednesday evening before the conference, a Friday bag lunch, and a Saturday evening banquet with guest speaker. In addition, we will have an exhibit area for participating vendors to display their equipment, near to the main conference room. Vendors interested in sponsorship opportunitiesexhibit space and or conducting demos, please contact the organizer/convenor (see below).

Who Should Attend?

We are expecting several hundred attendees representing technical diving equipment manufacturers, training agency personnel, instructors and instructor trainers, diving and hyperbaric medicine researchers, scientific and military diving personnel, government health and safety officials, and other organizations involved in rebreather diving. The meeting is not intended for diving consumers. If you are professionally involved in rebreather diving, we encourage you to attend. There will be a limited number of tickets available.

The RF4 Program and Proceedings

The RF4 scientific program committee consists of Drs. John Clarke, Simon Mitchell, Neal Pollock, Frauke Tillmans, and journalist Michael Menduno. The four primary focal areas are diver safety and culture, physiology, technology, and training. Proceedings of the meeting will be published and made publicly available.

The original Rebreather Forum was held in May1994 in Key West, FL.; Rebreather Forum 2 took place September 1996 in Redondo Beach, CA. Rebreather Forum 3 happened in May 2012 in Orlando, FL. A related event, Rebreathers and Scientific Diving workshop took place in February, 2015, on Catalina Island, CA. Click the links to download the relevant proceedings.

Shipwreck Diving & More

Malta is surrounded by hundreds of historical shipwrecks, including nearly 20 archaeologically-significant wrecks under the management of Heritage Malta. With their support, the three-day program will be augmented with organized diving on various historical wrecks in Malta the week immediately preceding the meeting (April 12-19) and additional shipwreck diving in Gozo the week after (April 23-30). This will include the exclusive opportunity for RF4 attendees to dive the wrecks in Malta’s newly launched deep water archaeological park. Diving activities will be coordinated by RAID, Heritage Malta and their registered dive centres. In addition, there will be workshops, and demonstrations held prior to the meeting.


We are still in the process of finalizing conference hotel details, schedule, registration, pricing, and diving operations. However, if you go to, you can enter your contact information, preferences, and affiliations, and we will email you conference updates and registration information as soon as they become available. 

The site will eventually serve as the repository for all of the information about the meeting, including online conference registration. Please save the dates and share the information with your colleagues. 

If you have questions about the meeting, please email us at: To contact RF4 organizer/convener Michael Menduno directly email: or RF4 . Tel:+1.760.831.9494

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Medical Research

100-Day Undersea Mission Promotes Marine Conservation




Historic “Project NEPTUNE 100” Studies Hyperbaric Medicine and Promotes Marine Conservation from Jules’ Undersea Lodge


Key Largo, FL – For the first time ever, a human will remain in an undersea habitat for 100
days and conduct cutting edge diving medicine research.

Beginning on March 1, 2023, Jules’ Undersea Lodge in Key Largo, FL will host Project
NEPTUNE 100, a 100-day undersea mission to support marine research and conservation.
Managed by Marine Resources Development Foundation (MRDF)/MarineLab, the
project aims to boost support for marine conservation from its unique undersea base on the
bottom of a mangrove lagoon teeming with marine life from manatee to seahorses. The
former undersea laboratory will serve as a “Digital Studio in the Sea” broadcasting
interviews and science demonstrations to ocean enthusiasts around the world.

Distinguished hyperbaric medicine researcher and diving explorer Dr. Joe Dituri, Ph.D.,
DMT, CDR-US Navy (ret), will be the Aquanaut in residence for the entire 100 days. Dr.
Dituri is a retired Navy Saturation Diving Officer with a PHD in Biomedical Engineering. He
will be conducting experiments to study the effects of long-term exposure to pressure and
working with other researchers on diving medical issues, as well as teaching his hyperbaric
medicine and medical school courses from inside Jules’ Undersea Lodge. Dr. Dituri is Chief
Researcher for Underseas Oxygen Clinic in Tampa, FL. The International Board of
Undersea Medicine ( is the presenting sponsor for the mission, supporting
his research.

Rebreather Forum 4

Multiple researchers will join Dr. Dituri in the 100-day mission. The mission will feature
regular broadcasts with scientists talking about their experiments in Jules’. Some will live
underwater with Dr. Dituri for days at a time. Throughout the mission marine specialists will
be joined by social media influencers to highlight the important message of ocean

MRDF/MarineLab is partnering with other conservation organizations to select topics and
speakers of global interest. Social media influencers will join these speakers and
researchers to amplify the important message of marine conservation. Since April of 2021,
the special nature of Jules’ Undersea Lodge – the world’s first undersea hotel – has
attracted over 45 million YouTube views. Based on this exposure, over 100 million views
are expected during the 100-day mission.

Marine exploration pioneer Ian Koblick, Founder and Chairman of the Board of
MRDF/MarineLab, is taking an active role in charting the direction and setting goals for the
mission. Mission Director Thane Milhoan is responsible for implementing Ian’s vision.
Any profits from the mission will be donated to MRDF to support its MarineLab
Environmental Education Center. MarineLab’s programs inspire today’s students to become
tomorrow’s scientists and policymakers, creating conservationists through education. More
information is available at

Anyone interested in participating as a presenter, media influencer or citizen scientist should
contact Mission Director Thane Milhoan or 305-451-2353. Several
sponsorship opportunities are also available; anyone wishing to sponsor this event please
contact Kim Gregory, MRDF Director of Development or 305-451-1139
ext 3.

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