Andreas W. Matthes

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Technical diving

During descent checking deco gases, Cenote Sabak Ha, Yucatan during deep cave exploration

I took my first training in technical diving in 1995 when completing the deep diver, advanced nitrox, technical nitrox, trimix as well as trimix blender course. My Instructor was Terrence Tysall, co-owner of the Orlando Dive Center in Orlando, Florida. Most of my training dives where conducted at 40 Fathom Grotto, back then run by Hal Watts, whom I met there.

After my training completion in 1995 I participated on a Cambrian Foundation expedtion to the bottom of the Blue Hole in Belize in 1996 and 1997, as well as to the bottom of the Abyss cave located on Lighthouse Reef, Belize. One of the big exploratory discoveries was Dill cave within the wals of the Blue Hole.

In 1997 during the anual Nohoch Exploration expedition I organized and conducted deep cave exploration dives in 'the Pit' area of the Dos Ojos cave system, Mexico with the Nohoch Nachich Cave diving team that resulted in the discovery of the BMB passage.

In 1997 I participated on a Cambrian Foundation exploratory deep wreck diving trip in Lake Superior to dive the fantastic wrecks of White Fish Point. The Trip organized by Terrence Tysall and Mike Zee led us to wrecks in the range of 140 feet / 43 meters to 290 feet / 88 meters. Wrecks such as the Walter Wathau, Comet, Lake Superior and others where visited.

During 1998 a series of deep ocean drift wall dives in the 300 / 90 meter to 500 feet / 150 meters where conducted to explore the deep wall along the coast of Q.Roo and in particular in front of Puerto Aventuras and Playa del Carmen in order to understand and document erosion marks from times when the ocean level was around 300 feet / 90 meters lower as it is today during the last ice age.

In 1999 a wreck and cave exploratory trip to the Solomon Islands organized by the Cambrian Foundation led to documentary dives on the USS Aaron Ward, USS Kanawha, USS Atlanta and others. A dry cave on Florida island and some underwater caves on Malaita Island where discovered and surveyed.

In 1997 - 2002 I organized and engaged in deep cave diving exploration in the central Yucatan to discover and explore previous unexplored deep caves. A number of small projects and discoveries resulted out of the exploratory push.

In 2001 I went on to open ProTec Advanced Training Facility in Playa del Carmen, Mexico with the focus to further the local knowledge of technical diving, training and support.

The training and support for technical diving is still strong but newer technologies such as Closed Circuit Rebreather ( CCR ) diving has taken up a share of previously open circuit deep technical diving.

I am an active technical diving Instructor for IANTD and TDI and teach the following technical diver programs:

Deep diver, Adv. Eanx, Technical nitrox, Normoxic trimix, Hypoxic trimix as well as Trimix blender courses, Staged deco procedures, Extended range, Advanced trimix diver courses, Wreck diver, Advanced wreck diver and Technical wreck diver.

I am a IANTD Instructor Trainer and evaluate Instructors for the following Instructor ratings:

Deep diver, Adv. Eanx, Technical nitrox, Normoxic trimix, Hypoxic trimix as well as Trimix blender courses, Staged deco procedures, Extended range, Advanced trimix diver courses, Wreck diver, Advanced wreck diver and Technical wreck Instructors.

just prior a technical deep cave dive in central Yucatan cenote Sabak Ha

Technical diver students defore the dive, Utilla, Honduras

Trimix students before a deep dive, Playa del Carmen, Riviera Maya, Mexico

prior entering the water for a deep wreck dive off-shore the Dry Tortugas, USA in summer 2003

Solomon Islands deep wreck diving prior descending to USS Atlanta with triple pack on back 1999

Solomon Islands deep wreck diving prior descending to USS Atlanta with triple pack on back 1999

Cambrian Foundation Belize deep cave exploration tream after a 500 foot / 150 meter dive into the Abyss cave, Lighthouse Reef, Belize 1997

Belize Blue Hole expedition team in 1995

prior to deep dive to the bottom of Belize Blue Hole in 1995

Roatan, Honduras deep wall diving in 1995

During my Technical Diver training at 40 Fathom Grotto in 1995