Ocean Discovery

Beneath the waters of the Baltic Sea lies HMS Cassandra.

In 2025, Ocean Discovery documented the wreck using high-resolution underwater photogrammetry, creating a detailed digital twin from more than 15,000 images. The project was carried out together with WAVES Group and JD-Contractor on behalf of the UK Ministry of Defence.

The attached image is a cinematic visualization based on real-world survey data from the project. Wreck geometry is derived from underwater photogrammetry; environmental effects have been digitally rendered.

Visit our website for project updates. A dedicated HMS Cassandra project page is currently under development and will be published soon.

https://oceandiscovery.org

When you see the images of more than five tonnes of ghost nets recovered from the wrecks Bruin, Magdalene, Molund and Östanhav, it becomes clear why projects like these are so important.

In 2024, Ocean Discovery carried out the initial documentation of the wrecks on behalf of the Swedish Agency for Marine and Water Management. Using underwater photogrammetry, we created detailed 3D models of all four wrecks, which were later used to support the planning and ex*****on of the recovery operations carried out by JD-Contractor. Digital twin of the wreck Magdalene attached below.

The digital twins made it possible to study the wrecks in detail before work began, plan the operations, identify where the nets were entangled, and determine where they could be safely and efficiently cut free. The models also provided valuable situational awareness for the complex underwater recovery campaign.

The results speak for themselves:

• More than 5 tonnes of lost fishing gear recovered
• Multiple seals found entangled in the nets
• Environmentally hazardous oil identified in two of the wrecks

This is a clear example of how digital twins and real-world survey data can provide better decision support, safer operations, and tangible environmental benefits.

Congratulations to JD-Contractor for the successful recovery operation, and many thanks to the Swedish Agency for Marine and Water Management and everyone else involved in the project.

Read more in the Swedish Agency for Marine and Water Management article:

https://www.havochvatten.se/miljopaverkan-och-atgarder/miljopaverkan/fororeningar-och-farliga-amnen/vrak/havs-arbete-med-vrak/bruin-magdalene-molund-och-ostanhav.html

https://www.svt.se/nyheter/lokalt/blekinge/fem-ton-spokgarn-bargat-fran-vrak-utanfor-karlskrona-salar-satt-intrasslade

Our new website is now live.

Over the past months, we have completely redesigned Ocean Discovery’s online presence to better reflect who we are today and where we are heading.

The new site highlights our work in underwater documentation, digital twins, marine infrastructure, environmental projects, and advanced subsea reality capture.

From the discovery of Mars Makalös to the documentation of M/S Estonia and environmental wreck surveys, our focus remains the same: delivering reliable data and decision-ready documentation from challenging marine environments.

Take a look and let us know what you think:

https://oceandiscovery.org/en/

Ocean Discovery | 3D-skanning och ROV-inspektion under vatten Ocean Discovery AB levererar 3D-skanning under vatten, ROV-inspektioner, side scan sonar, marinarkeologi, provtagning och digital visualisering.

Vår samarbetspartner BUVI Scandinavia presenterar våra tjänster inom 3D scanning på ett illustrativt sätt. Vi erbjuder en hel rad tjänster så som sjömätning för vindparkprojektering och
inspektioner under ytan.

Fotogrammetri BUVI Scandinavia Metoden används i en rad olika tillämpningar, t.ex. hamninspektioner, brofundament, 3D-skanning av vrak, rörledningar, tunnlar och alla typer av undervattensinfrastruktur