Overcome the constraints of the environment through 3d modeling.

Exploration and acquisition of knowledge about our underwater heritage is confronted with the difficulty of access to the underwater world. The development of photography and computer technology now makes it possible to carry out large-scale field surveys using photogrammetry.

Based on the principle of stereoscopy, it is a matter of producing a 3D model resulting from the identification of peer points within a 2D photo set. The models offer a realistic representation with a maximum resolution level.

Detailed mapping

  • Modeling complex structures
  • Multi-scale approach
  • Architectural complexity research



  • Acquisition of multiple (distances, surface, volume) and complex metric data
  • Reliability and accuracy of measurement
  • Assessment of temporal trends


  • Easy to implement
  • Reduced investigation time
  • Non-invasive method

Some of our previous work

POLARIS platform

POLARIS is a technical and educational platform for the promotion and development of collaborative sciences.

Implemented in 2016, POLARIS is positioned as an experimental tool for the establishment of a local marine observatory, through the development of technical and pedagogical expertise in the acquisition of standardized data, for long-term monitoring by the diver-citizen.

POLARIS is initiating a new local dynamic by bringing together coastal stakeholders around common objectives, reflecting the knowledge, preservation and management of this environment. It is an operational platform for collaboration between citizen sciences and research in marine ecology applied to territorial management.

It offers activities to learn how to observe, contribute to the collection of data to complement scientific actions, train citizens to practice scuba diving with ecological interest, inform and support local policies for their environmental management.

This field platform develops methods and tools adapted to different actors according to their needs, wishes and skills. Built according to a collaborative, scientific and educational approach, it includes several interconnected components of actions, which involve a multiplicity of actors to contribute to the knowledge and common management of the marine environment.

Through a voluntary contribution, the diver positions himself as an actor in his observation; he relies on catalogues of observations with multiple themes to choose his observation which guides him in the species to observe and the methods to be used.
To learn more about POLARIS:
Research programs

Septentrion Environnement se positionne comme expert technique pour le développement des protocoles à suivre et l’apprentissage à l’observation environnementale ainsi qu’aux méthodes employées. Une note méthodologique, destinée aux décideurs et gestionnaires d’espaces marins méditerranéens, pour lesquels la plongée sous-marine constitue un outil de suivi du milieu en utilisant les sciences participatives est disponible ici.

For more information about POLARUIS and its mobile app : POLARIS flyer and contact Laura BARTH :

Underwater duplex

An invitation to an underwater trip away from the physical and technical barriers associated with immersion.

The duplex is a tool that we use to discover the underwater heritage (ecological, archaeological and cultural), to communicate on environmental developments (artificial reefs, protection modules for dykes or spawning grounds and nurseries...), or to demonstrate underwater techniques (specific field investigations, tek diving, visits to beacons or instrumentation lines...)

Facing an on-board screen, the images of marine life filmed live, parade under the eyes of the public.The underwater diver-animator appears on the screen and comments instantly on what he or she observes. Thanks to a transmitter/receiver communication system, a real conversation is initiated between the audience, spect'Actor, who remained dry, and the diver who is evolving nearby. The public is located in the immediate vicinity of the site (on board or ashore in a room) or further away with Internet retransmission.This animation can thus include an audience with diversified profiles (general public or professionals) and be of variyng sizes.

The discovery is made throughout the animation, the public evolves with the diver animator he follows and questions all along his submerged course.

The underwater duplex is suitable for a variety of terrain, from the bottom of creeks to the walls, from coastal space to the open sea.

Duplex gear

  • control room for the transmission of sound and image
  • HD underwater camera with lighting
  • underwater communication system

Environmental diving school

From « flippered » excursion to deep diving, our explorations are an opportunity to discover the landscapes and the marine world.

Combining technique, environmental approach and discovery of the marine environment, Septentrion Environnement takes its members on a discovery of the Marseille coastline, in and around the Calanques National Park, the Riou and Frioul archipelagos.

Aboard CroMagnon, a famous boat steeped in history from our creeks and recently renovated by the association, our outings combine educational exchanges and moments of conviviality. Our ambition: to cross-fertilize knowledge, train biologists in diving, train divers in biology or both!

Septentrion Environnement provides qualifying technical training, from child diving to the training of future instructors.

The experience of our supervisors allows us to diversify the potential of the training courses offered. It offers our members the possibility to go towards mixed diving, rebreather, first aid diving, photography

From snorkeling to deep diving, our explorations are an opportunity to discover the landscapes, to scientific initiation and participatory science.

Our outings combine the discovery of the underwater world, between coastal culture and ecological heritage in and around the Calanques National Park.

Notre bateau est amarré à l’INPP – Institut National de Plongée Professionnelle – Port de la Pointe Rouge – 13008 Marseille.

More information


Alongside its 7th owner, CroMagnon is earning its place on the list of underwater archaeological stories....


Between the Channel and the Mediterranean, sometimes making river or island stops, CroMagnon (formerly "Ace of Hearts") has crossed more than 1/2 century of maritime history, leading captains and sailors steeped in salt adventures in her wake.

With more than 60 years of existence, the boat has a diversified and eloquent CV, nourished by services provided in professional fishing, technical and recreative underwater divings.

Trawler, caseyeur and longliner on the Atlantic coast, CroMagnon turned her back on her native ocean (from the Beneteau shipyard in Saint Gilles Croix de Vie) at the end of the 1970s to cross over to the Mediterranean Sea displaying the "orange" booklet of pleasure craft. From then on, her various owners found her a charm as a travelling companion whose good manners we want to share. High school students, associations and the world of diving embarked on board for Corsica, then the Rhône, then again the Provençal coast after a round trip to Normandy (!!!!). It's a sea-sharing boat!

Alongside her 7th owner, CroMagnon earned its place in 1991 on the list of archaeological underwater stories; she was Henri Cosquer's adventure companion, inventor (i.e discoverer) of the rocky underwater cave located in the territory of the Calanques de Marseille National Park.

After almost 30 years of figuration at the port of Cassis around the Cassidain Diving Club founded by Henri Cosquer, CroMagnon is now in Marseilles at the INPP, tied to the landing stage of heritage boats.

Acquired by the association in 2014, the boat continues her adventure in the service of a living space that is dear to her: the Mediterranean Sea, its exploration, its environment and its culture.


CroMagnon is both our number one work tool and the link between all the association's activities with the admitted, members and partners it welcomes.

In a desire to conduct her around diversified activities taking place all year round, we have undertaken over two construction campaigns the partial refurbishment of the boat to adapt this tool in line with the needs of the association's activities. Thus, she can welcome a large and mixed public, from children to adults, to people with reduced mobility around recreational diving or scientific investigation.

Our ship features

  • Type : Wooden fishing smack boat
  • Dimensions: 12 meters long (39 feet), beam of 4m20 (14 ft)
  • Capacity: 20 people maximum
  • The advantages: Lifting arm and lift
  • Cruising speed : 7 knots



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