The concrete submarine yacht project has released a number of photos on the internet to document what we have been doing in the three decades of our submarine yacht development. Below is a summary of all those pictures at a single web page with short comments.

3 D model of the 200 ton / 18m submarine yacht finished in raw building in cartagena colombia. The barren hull has a building time of 12 months and a budget of 331 euro per ton. It is the first hull of a series production that will apply the lections learned with the 20 ton prototype in europe. The living space of 200 cubic meter about twice the living space of Ben Franklin will enable a small crew to be comfortable over long periods of time in open ocean cruising.

200 ton Submarine Yacht 18m / 4,6m

Man on top of the hull of the 200 ton submarine yacht

Red car in the backgound check for size

Propeller in raw building (missing streamlined fairing)

Man on top of the hull second picture

Lady in front of the sub

Building site in cartagena

Series of pictures starting with the prototype of the 20 tonner in austria and ending with the new generation yacht sub.

A sketch of the 20 ton prototype

Tourist application boarding over floating walkway

Releasing the concrete submarine from the crane at lake ATTERSEE in the nighties the hull is floating at the middle line.

The hull a couple of months later already ballasted and equiped with a sail (tower) that avoids waves going into the hatch when open. In this status the opening of the ballast valve adds some 200l water (200kg) to make the boat dive.

Second photo of craning

Lifting manouver in Thaur Tirol - the hull was transported 500km on a truck from its building site to its anchor site.

Neigbours in Thaur Tirol having a look at the craning operation.

The guy from Schenker checking the hull.

Explosion Sketch of the prototype in 4 seat configuration

Sideview 4 seat configuration.

Animation of a 360 degree view of the prototype hull.

A early sketch of a bigger hull.

Relation of hull space to underfloor ballast.

Sideview of ballast configuration.

Ballast underfloor

3d picture of a hull in sketch up

Floating and submerged concrete structures under hydrostatical load similar to a submarine hull.

Craning manouver on the lake, this is the only site where a industrial crane can come close enough to the shore and the water is deep enough to put a 20ton hull into the lake. Unfortunatly this space was later converted into a sandy beach for tourism purpose. The hull was trapped in the lake since then as there was no way to lift it out of the water again.

Me on top of the hull having a look at the inside - not a single drop of water entering - very good !

Pushing the hull out of the hangar with hidraulic jacks - this method will become handy on a much larger scale with the 200 ton boat many years later.

Boat is packed and ready to go on a 500km trip to lake ATTERSEE one of the biggest lakes in the alps where wave build up and general conditions are similar to ocean conditions.

Craning from the truck to the water in Steinbach am Attersee.

Schenker Spezialtransporte handled both the crane and the truck they are the most experienced firm in this segment and did not blink an eye when asked for craning a concrete submarine.

A big garage in THAUR in Tyrol in the Austrian alps was the birthplace of the worlds first concretesubmarine. The Houseowner, the Manager of the local Schenker filial, me and a couple of Neighbors checking how we will lift the thing...

A couple of weeks later on the lake - the hull is anchored in front of Camping Grabner in Steinbach - we are putting in the fixed ballast to bring the hull to its submarine yacht floatation line. Still missing the sail (tower) structure, the acrylic hatch is open. 2 Snorkel tubes for ventilation to keep the inside a condensation free and dry space.

Inside the hull of a concrete submarine. No ! it is not a claustrophobic dark and humid space. Light is comming in trough the viewports and make the interior nicer than the space in the belly of a average sailing yacht everything is dry and the temperature is similar to the sourrounding water - cool on hot summer days and warm in winter. Yacht owners who spend a fortune in yacht air condition are stunned how fine the inside of a concrete submarine yacht is.

The picture above shows a 4 seat configuration with the engine room divider/door made in wood. The pictures below shows the ballast below floor configuration in bigger yacht submarines. The ballast is stored in cells below the flat floor.

The sketch is for a 15m sub that was in plan for a expedition sub. This sub would not be big enough to have a sail that works as a closed cabin but would protect a person standing on the sub with a barrier of 120 cm similar to the sail of the prototype sub.

Sattletank hatch and sail configurations for small subs. Front and top view.

Sideview of a simple sattletank configuration.

A 25m sub for a Jules Verne Nautilus style voyage to present a new AIP engine that was discussed with customer. A yacht sub that will come to a size where it becomes a submerged living space of considerable size similar to a big yacht hosting all the comfort and luxury for a extended family is a project we are still looking forward to realize.

The boat below was a small expedition sub that would stand tough conditions and can left alone during months in bear country. For everyone who ever have seen what a bear can do to a yacht or a car when looking for food will be clear why a submarine is a excellent solution due to its quality to be unopenable for bears, pirates and other burglers.

The submarine mega yacht - this boat will still get you all the attention when showing up in Monaco among all those floating millionaire palace yachts. Even if it is a few meters shorter than the stars of the market.

What if we keep the concept more stationary - a deep sea salvage habitat to bring a crew with all its supplies down to a salvage site and do some work with ROV jim suit and similar - non saturation devices. This would skip the need of a expensive surface ship that is suceptible to climate.

Living space on the ocean and below the waves. Concrete shell structures can offer a wide range of solutions.

The sub surface habitat - just out of reach of the waves - still benefits from sunlight. A deckspace to use when weather is fine. Safety below the waves when things become ugly - this can take "houseboats" to the open ocean - seasteading - can be a new style of living.

Concrete Spheres in a double hull configuration for a autonomous salvage and investigation vessel. Concrete spheres can be built in unlimited size so this boat can be really big. Very different to the small boats based on steel and titanium spheres that can only be built to the limited size of 2m diameter.

What Jules Verne predicted was not military submarines - it was a boat that would allow its crew to live and stay under the waves - captain nemo created a new lifestyle - yachting lifestyle is good - submarine yachting is better.

3 d animation of a small sub 9 viewport configuration, flat bottom ballast, engine room divider, diesel engine configuration.

Nautilus - the father of all submarines - a pressure resistant hull - made from a material very similar to concrete - a simple buoyancy control - no diveplanes - approved as a concept by mother nature for millions of years. The hull is good for 600m depth.

Concretesubmarine 200 ton at work

Out of the shed, the concrete submarine yacht on its way to the water. Moving a 100 ton hull is a task that needs a similar amount of effort and manhours than building it. While moving we are testing for hog and sag resitance, torsion, strange forces of all kind...

We have pulled a bit out of the discussion, on most of the forums we presented our projects, we are no longer going to discuss questions like "is concrete a feasable building material for private submarines" this kind of questions is already answered - what we want to discuss now is "what is the future of submarine yachting"....