‘Project Undersea Station’ Introduction

Wordpress Header (updated 14.08.2020; edited initial steps; added new renders) Project CalamarPark Undersea Station aims the development of a new generation of undersea settlements. Technically based on experiences of prior stations there will be several new considerations concerning expandability, size and usage. All results will be open-source (except some marketing details necessary for continuous popularity) and anybody who is interested has the chance to contribute his ideas. Until the minimum financial frame is completed we will go on collecting as many information as possible, implement them to a realistic blueprint and constantly improve the final design. Ultimately the final goal is the actual building of the habitat.

How to join

Diver training with true sized model of the ISS module Zvezda, 2002, source: Wikimedia Commons, User: Errabee

Just add your idea or suggestion into the comment box under the corresponding article. If the comment is not too fancy we will publish it in the shortest of time. Frequently we evaluate all comments and add them to the concept eventually. Like this we collected many thousands of visits and hundreds of precious contributions already. Please understand that you have to register to avoid bots and spam. Your mail address will not be used for any business activity and will not be given to a third party.

This is a call to anyone who is interested in the subject. Statistics show that we have many visitors from China, South Korea, Russia, Brasil etc. If you have any comment on one of the chapters then do not hesitate to contribute from wherever you are. Do not worry about your English: it is the content that counts.

Elders should feel encouraged to contribute their precious experiences in order to support our project and to forward knowledge to the younger generation.

We need all of you and wait for your messages.

Our Past

Under the former project name of UnderwaterPromotion.com (see Who The Squid Are We?) we understood, that new approaches of Underwater Living are very popular. It showed clearly the demand and interest of new concepts for habitats on the ocean floor. Therefore we opened an online forum in 2007 to collect as many ideas as possible and in the next five years we had more than 200.000 interested readers and contributers (bots and search engines excluded). Examples for other approaches all around the world are sensational projects like ‘Poseidon Resort’ or ‘Hydropolis’ reaching great popularity worldwide.

Step by Step

We are absolutely convinced of the practiality of the undersea station project.

In the beginning we planned to start with the cheapest possible concepts in order to reduce initial costs . This plan called for the construction of a classic cylindrical habitat. This first structure was supposed to be used as a simple experiment platform consisting of an inexpensive pressure-resistant tank (e.g. decommissioned gas tank), to be refurbished and later be used as an emergency shelter, decompression chamber or mobile facility; the necessary link hatch to the main structure will be installed from the beginning. But history shows, that the results of a small habitat would be no sufficient to convince funders for an extension.

After finding a solution how to combine all application requirements and the different habitat conditions we came to a concept of a semi-permanent structure and decided to change the taken steps.

1. Establishing a small working group to contact potential location administrations, investigate license procedures, present the concept to potential funders, join fairs and to start talk with appropriate ship builders. Start of an event sequence and continuous media coverage.

2. Construction of the first module mounted on a submersible platform, a small emergency decompression facility (DDC) and life support buoy (LSB) on the surface as well as a simple shore center. With a targeted total dry space of more than 65m² it will be the largest underwater habitat ever built.

Module 1 interior

3. With more and more features being added, first long-term stays (>40 min.) will be considered. Improving quality of DDC, LSB and shore center. Beginning of HUB services to developers of other habitats inside the park. Opening of the on-surface visiting facilities.

4. Construction of the second module, that will be linked to the first.

Possible configuration of module 1 and 2

5. A deeper branch and/or additional modules will be developed. The remarkable size of the extended structure will make new purposes arise.

Possible configuration of other modules attached

Living Space vs. Shelter

Undersea Station Helgoland
Image from Wikimedia, user: Klugschnacker

History shows that all previous undersea stations were not habitats in its actual sense, but shelters for short term stays. The new concept has to take account of the ‘human scale’ of living space. Therefore the rooms have to be designed accordingly, concerning shape and area. To expand the subjective reception of the living area, its colour concept, interior acoustics an privacy areas will be rethought completely. See also the Human Integration Design Handbook (NASA 2010) available on the CalamarPark Digital Library.

Features to be used for the first time


One of the main features of the new design will be the modularity. Different modules of different purposes can be attached without weakening the structures stability. Like this we can grow according to the current financial situation, and older modules can easily included into the expanded version. An inspiring example would be the International Space Station (ISS) that grew slowly until its final configuration.

Not being modular would bring the project to a deadlock preventing further development. The biggest ever built underwater habitat was Sealab II/III with about 65m² of dry space, which is far less than an average house built in 2009 in Germany (see grey balloon in the graphic below) and nearly a third of an average house in the US. Modularity was not an issue in Sealab; an increase of usable dry space would have had required the construction of a complete new habitat resulting in double expenses.

Comparison of habitat sizes and new built homes

This modularity allows a final shape very different to former habitats. New York Designer André Dettler followed a similar idea when presenting a concept for a modular Space Station. The highest structural strength would have been reached at the final configuration.

Gallagher Space Center Concept, courtesy André Dettler, New York
Single Module of Gallagher Space Center Concept, courtesy André Dettler, New York

Connecting Corridor

Another feature will be the implementation of a connecting corridor. Until now all habitats were designed as one compartment with different areas or as a series of rooms with different functions. To reach one of those rooms you had to pass several others (see habitat ‘Tektite’). In the CalamarPark Undersea Habitat all rooms of the structure will be reachable over a corridor which is part of each module. This continuing corridor ensures reaching each room without passing all the others. Institutions will be able to rent their own space. Sleeping areas and machinery  will be physically split from each other, while the corridor itself will be equipped with chatting tables beside windows to a the underwater world. A corridor like that might seem like dead space, but it is an inevitable part of the structure and an important architectural feature playing a huge role in establishing the human environment.

Short Visits

One part of the habitat will be an emergency shelter, decompression bell and visitor habitat in shallow waters nearby or linked to the main structure. Between missions anyone with the right physical condition will be able to enter this module of the station after a short introduction course. Inclusive descent, in-habitat duration and ascent the dive will be within the non-decompression time, requiring no decompression while returning to the surface. Visitors will get the full habitat experience without the risk of decompression injuries. These short visits in very small groups will provide an additional income to maintain daily operation.

The Park

Calamar-Park will not only consist of the habitat, but also of a surrounding park. This park will contain different kind of sculptures (see Deep Art Underwater Sculpture Exhibition), educational trails, freediving installations, a surface pool, an on-surface observatory with glass bottoms, areas for external habitat experiments and other additional projects. It aims to attract recreational divers to the surrounding of the habitat and creating a closer relation to the project and its environmental goals.


Another part of the park will be the hub, which will allow external projects to connect to the infrastructure set up for this purpose for electricity, water, communications, data traffic and logistics. Calamar Park will thus become a testing ground for new approaches to long underwater stays.

Wet Lab

One feature of this park will be the Wet Lab, a lighted platform in the close proximity of the main habitat, fully observed via cameras and the viewports of the habitat itself. It will be open to all divers to develop new ideas to the collection of ‘100 Things to do Underwater’. During habitat missions this wet lab will be the experimental facility for evaluating new procedures of examining medium size archaeological artefacts or biological specimen without the necessity to bring them into the habitat.

Latest Drafts

Combining all contributions that reached us so far the latest and most favored shape is the “Draft No.5: Hangar with right angular docking keys” as described under the ‘Structural Shape’ category:

Purpose – and the question ‘What for?’

“Without doubts one of the biggest challenges of the 21st century is promoting a deeper understanding for the oceans that after all covers 70% of our planet.” (Frank Schätzing, Nachrichten aus einem unbekannten Universum, 2007, p. 554-555, ISBN978-3-462-03786-9)

20.000 Leagues Under The SeaFinding a way to live on the seabed is very similar to space exploration: We can impossibly foresee the future potential of undersea stations. But it is our nature to face challenges. And, yes, there is no doubt that we have to change our view and behaviour to the world oceans. We have a surprisingly insufficient relation to the oceans leading to serious dangers in the marine ecology caused by neglect and unawareness. The undersea settlement will be the perfect tool to change this view and a reminder of the marine issues.

To achieve highest popularity it is vital to include civil participants. This goal will be achieved by the open-source idea, the concept of a surrounding underwater park and the use of online technologies to connect anyone with the underwater settlement. Still the undersea station will be absolutely independent of single-direction or political purposes, though strictly transparent.

Until now we defined the following potential applications and started talks with senior leaders:

  • marine sciences (oceanography, underwater archaeology…)
  • tourism
  • education
  • environmental protection
  • space agency training
  • entertainment
  • advertisement
  • private civil participation
  • human health and new medicines from the marine environment

At the same time this project aims to create a dream to believe in; a medium to attract especially the younger generation to a life of progress, dedication, technology, science and ecology.

Anyone has experiences with a certain value. Any contribution, intellectual or financial, represents one opportunity to fulfill anyone’s duty as an ancestor of future human generations: to leave a trace in history.


Though we all developed from the sea and our bodies mainly consist of water we are not aquatic creatures anymore: without scuba equipment we can not breathe, without diving mask we can not see, without fins (or at least extra weights to walk on the seafloor) we can not move forward. Even with fins we are very slow and helpless in currents, just because our body structure does not have the ideal set of muscles to move the fins economically. Without suit we are unable to maintain the appropriate body temperature and are vulnerable to all kind of marine life; underwater we are unable to speak, we are unable to use our hearing sense to localize sources of noise; we are unable to sense smells and our skin starts to dissolve after some hours in the salt water.

To live underwater we have to simulate a complete biosphere including food supply, light, breathing gas, heat, energy etc. And all of it in an extreme environment. Besides we are dealing with huge forces: the positive buoyancy of any air-filled habitat underwater is quite similar to the weight a crane has to bare on dry land if the habitat would be filled with water and hang on its boom. Since we can not build it inside the water, it has to be light enough to be moved from the shipyard into the water, towed over the moving surface of the sea to its operational site and lowered to the seafloor carefully, where it has to be moored and secured against drifts and bad weather conditions.

Beside the technical aspects sufficiently documented by approximately 65 habitats built between 1965 and 1977 it covers many various difficulties like sustainability, extensibility, physical and psychological health of inhabitants etc.

To keep the station running a well-thought marketing plan should be done. Different groups of participants may have different demands for example on accessibility, location or interior.

On the other hand technical developments make it a lot easier today. More efficient technologies like LED lighting require less energy that now might be generated by solar modules on the surface. The GSM net and the internet make it easier to submit the telemetry and to control the project remotely. Energy sufficiency of air-conditioners, refrigerators, monitors etc. have increased drastically.

Even if current projects in different parts of the world were stopped in the final stages the global echo shows the interest and potential. And all failures of others are not in vain. They produce new solutions and stronger foundations for future attempts.

Therefore it is not a question of whether we return to the ocean, but of when we will do so.

This should be an attempt to ignite the dream of living under the sea.

With best regards

Mart Henke

To get a more detailed overview of desired features for the habitat, please visit the page “Structural Shape – General Considerations“.

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Rob Bryan
Rob Bryan
2 years ago

I worked as a habitat technician and support diver at the Aquarius habitat, and a saturation technician in the commercial diving industry. I have studied the concept of a commercially viable undersea habitat at length and with several groups. My concept is a substantial habitat about 1.5x to 2x of Aquarius, using engineered and type approved fiberglass tanks that will withstand the external pressure required for in-habitat decompression. Since there is no welding, fitting out and modifications would not require repeating the hydrostatic testing required for classing. Corrosion and electrolysis are also eliminated. There is ample prior art for fiber… Read more »

Matthew Cathy
Matthew Cathy
3 months ago

Great job with Ignition Con. Please reach out to me about how I can support what you are doing.

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