Facility Dossier Site-DE25
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SCP Foundation Facility Dossier


Official Designation: Submarine Site-DE25

Site Identification Code: UWL-DE25

General Information


Usage: Site-DE25 is an underwater base and designed as a port for the Germanophone Foundation's submarine fleet. Also located here are several containment teams that monitor and contain anomalies in the North Sea from this site, as well as research centers for research and development of new diving equipment and underwater constructions.

Founded: 2. February 2012

Ort: North Sea, northern part of the german exclusive economic zone

Cover: Known to the public as the construction ruin of the offshore wind farm H2-20

Function: Housing the Germanophone Foundation's submarine fleet, monitoring and containing anomalies in the North Sea, researching underwater equipment and construction.

Size: 138,000 m2 of usable space inside, about 98,000 m2 outside, lies at a depth of >90 m.

Above Surface Structure


The surface entrance to Site-DE25.

Side Access: The only above-water access to Site-DE25 is a platform known to the public as the ruined control platform of H2-20. The entire structure is made of seawater-resistant, high-strength steel and, according to simulations, is capable of withstanding multiple hits from heavy naval artillery without toppling. In its central pillar is a freight elevator with a load capacity of 2.5 tons that leads down into the actual site.

This access can be reached by ship and also by helicopter, as a helipad has been installed on the roof. Shiploads can be unloaded using cranes built into the underside of the platform. However, to avoid detection, such actions are planned to always take place at night.

The platform has several forms of armament. At each of the four corners there is a gun turret camouflaged by a container, each with a 76/62 Compact gun against targets in the air and at sea. In addition, on either side of the helipad are two Patriot anti-aircraft missile systems that extend from the roof, plus two MANTIS missile and anti-aircraft guns for each side. Half of these weapons are manned at all times.

10 m below the water surface, the platform's base spreads to accommodate a battery of swivelling torpedo ramps that allow the sentry to fire Mark-46 lightweight torpedoes in any direction.

  • Guard Post Staff: The platform is regularly manned by 20 guards, including artillerymen, who rotate in overlapping shifts. Each is equipped with pepper spray, a telescopic baton, taser pistols, and an HK SFP9. In addition, at least five guardsmen carry an HK433-12.5" assault rifle at all times, with others available to the entire guard force as needed, along with M47 Dragon and Fliegerfaust 2 bazookas.

Submarine Structure

Site-DE25 was the first underwater site designed and built using SCP-005-INT. The site was built into the seafloor, however, the massive resource requirements of SCP-005-INT's machinery caused the seafloor to be lowered far into deeper waters by resource exploitation. The resulting aisle has since been developed into a docking station for SCP-005-INT, and at its deepest point is 200 meters below sea level to allow the submarine to dock at the underwater base without protruding from the sea. Because of the sheer size of this craft and its importance to Site-DE25, it is now jokingly referred to as "Big Mom" by resident personnel.


One of the gals tunnels of Site-DE25.

The site itself, due to its operational purpose, is very extensive in order to have submarines docked and housed. For aesthetic reasons, numerous large windows made of thirty-centimeter-thick bulletproof glass have been installed in elevations so that the surrounding area can be observed in the light of the site. The glass tunnels that exist in some topographic depressions of the seabed are similar in design and serve the same purpose. Due to the fact that they are vulnerabilities of the site, the areas adjacent to them are evacuated in hazardous situations and sealed with heavy bulkheads to limit water intrusion to a controllable level. The same applies to the shafts of the three elevators that provide access to all levels of the site.

The buildings are composed of numerous room segments, which can all be individually sealed with drop bulkheads to prevent complete flooding of the site in the event of water ingress. If the site cannot be saved in this way, escape pods are located throughout the site to allow all personnel to be evacuated to the surface.

RTF DE25-𝖀 "Ultramarine" is responsible for the security of Site-DE25. By default, this RTF has only the weapons of the guard, but in case of danger it has access to the arsenals on floor U-1 as well as the diving equipment in floor U-4 and manned gun positions. To defend the site against major threats, the site also has deployable and swivelling torpedo ramps and numerous launch tubes for IDAS water-to-air missiles, which, combined with access platform countermeasures, will surprise most flying and floating adversaries. RTF DE25-𝖀 "Ultramarine" is required to have at least a quarter of its members certify as rescue divers to enable off-site rescue missions. The RTF specifically does not have command authority over the submarines; this is the responsibility of the site-director and head of security, but may request assistance from their crews.


Maintenance worker Kunze together with a DE25 drone at work.

Much of the site's maintenance and cleaning happens automatically. SCP-005-INT produced numerous hydrogen-powered drones during the site's construction to detect and repair damage to the buildings and keep the interiors clean. Some were disassembled for the purpose of replication and classified as non-anomalous because their operating principles can be explained by the Foundation's known laws of nature. However, the technology used in them is so advanced that replication in locations other than Site-DE25 has been impossible.

Main Accesses: Site-DE25 has three main accesses, located to the west, north, and east of the station. These are reinforced, 70 cm thick double bulkheads that form an airlock and are capable of withstanding most torpedo attacks with minimal damage. All locks have a height of 12 m, a width of 15 m and a length of 65 m.

  • Side Accesses: Site-DE25 has numerous side accesses, but most of them are hidden and intended for the site's drones, which do their work outside the site. Access points also exist for humans, but only for divers. They are used for inspections of the outer walls and research missions in the immediate vicinity of the site. They consist of circular decompression airlocks 2 m in diameter and 5 m long. They are equipped with a digital clock and are designed to allow divers to regulate the pressure within the chamber after entry, working through their decompression stops in sequence1.

For emergencies, four emergency breathing apparatuses are installed in the walls of each airlock, through which the diver can continue to breathe should his own air supply be exhausted or lost. In Site-DE25, only trimix gas mixtures2 is used due to the water depth.

Harbor: Immediately adjacent to the locks is the submarine harbor, which surrounds the actual site in a semicircle and has a 10 m draft. The harbor is divided into 18 segments by 3-meter-thick partitions with a 12-meter-high and also wide passageway, which can be individually sealed via drop bulkheads in case of water ingress. The port also has dry docks at both ends of the semicircle where the stationed submarines can be inspected and maintained. Each part of the harbor is accessible via pressure bulkheads that seal automatically when water enters. Currently, 8 armed submarines, 2 of Class 212 A, and 6 of Class 206, plus 12 research submarines of various types and three delivery submarines are anchored here, the former positioned near the entrances for strategic reasons.

  • Floor U-1 This level is immediately adjacent to the platform's freight elevator. Storage areas for all materials and food are located on this level. Both are packed watertight so that they can still be salvaged and reused by divers in an emergency should a fatal breach of the exterior walls occur.
  • Floor U-2 Administration, command offices, archives and administration are located here. The administration offices and command posts are reinforced with bunker walls and can be sealed from the inside to continue to manage the site even if the level is completely flooded, should an emergency situation arise. Should this occur and overcoming the threat appear futile, escape pods are available within the rooms. Also housed here are the facility's servers, which are normally waterproofed from the rest of the site and run with water cooling.
  • Floor U-3 This level is reserved for staff accommodations and needs. Available are a gym, a movie theater, a bowling alley, a wellness facility, and a gymnasium with facilities for various ball sports and gymnastics. In addition, there is an indoor swimming pool here that also offers various sports, including underwater rugby, water polo, underwater field hockey and, since 2019, underwater Jenga. The refectory has also gained fame throughout the German-speaking Foundation, as its entire north side is one large window from which the site and marine life can be observed.
  • Floor U-4 This floor houses the submarine harbor, storage for diving equipment and spare parts, a diving workshop and a TÜV office for inspecting submarines and diving equipment subject to TÜV inspection. Also located here is the module workshop, which manufactures containment modules for the containment area. These are then transported by submarine to their destination.

Algae cultures in experimental laboratory 3-C.

Floor U-5 This level houses numerous research laboratories and facilities for various purposes and aquariums for organisms of special interest. The level is capable of simulating a wide variety of underwater conditions and is therefore used for research and development of new underwater equipment and vehicles. The underwater cableway leading to the containment area is also accessible from this level. This level also houses the infirmary, which has its own decompression chamber to treat diver's sickness.

  • Floor U-6 This floor, deep in the seafloor, houses the site's food production, air renewal, energy storage, and drone manufacturing facilities. Site-DE25 is set up to operate self-sufficiently for at least two months in the event of a siege, and has a large amount of various livestock fed by extra farmed algae that grows on this level as well as outside the site. Also present are crops that are illuminated with blue, UV and red light on beds and small fields, and are supplied with carbon dioxide collected at the site and the waste of farm animals and personnel as fertilizer. Oxygen is transported at this level along with hydrogen from the turbine farms, separating the two gases. The oxygen is used to provide breathable air to the residents, while the hydrogen is used as a power source for the generators located throughout the site and the submarines at the site. Excess gases are stored in pressure tanks.

Investigation of the drone manufacturing equipment has so far been suspended by site management for fear of damage until the Foundation is capable of replicating these products. What is known is that the facility apparently collects resources from the seafloor via drones in order to maintain itself and the site with them and to enable the production of more drones. Which drones to produce can be arranged via a user-friendly terminal. Removal of intact drones from the site is not recommended, as they all have some sort of homing program by which they will attempt to return to Site-DE25 regardless of their current position.


  • Energy Production: A large part of the outer area on the western side is occupied by the power supply. As part of the construction of Site-DE25, 89 current turbines were erected on the seabed, using the prevailing ocean currents to generate electrical power, which in turn is used to split water into oxygen and hydrogen by electrolysis. The turbines are 26 meters high and have rotor blades 16 meters long. The gases produced are then transported to the site through pipes. This method of energy storage was chosen because it eliminates the need to lay copper cables in the sea, which begin to corrode when exposed to salt water, and allows pipe segments to be easily replaced in the event of damage. Inflowing water is pumped through the pipes, which are specially powder-coated on the inside and outside, by the prevailing pressure.

Test Site The test site is located east of Site-DE25 on the seabed and is intended for testing of newly developed equipment. Tests involving anomalies also take place here on rare occasions, but these must be firmly anchored to the center of the site with carbon ropes to prevent escape.


Interior view of the cable car.

Containment Facility: The containment facility is a bunker facility that can be accessed from Site-DE25 by an underwater cable car and is located to the south of the site. This separate underwater base, which has its own flow turbines on its roof for power, is where the site's anomalies are contained. Only anomalous objects or Safe-class anomalies may be transported by cableway, while Keter- and Euclid-class anomalies must be transported by submarine. The base has three levels built into the ground that contain Keter, Euclid, and Safe anomalies from bottom to top. Anomalous objects are also held in the top level.

The levels are separated by 5 m of reinforced concrete and are constructed of modules in frames. These modules are transported into the site through an airlock in the roof of the facility and transferred to their assigned level by a conveyor system.



Dr. Häher bei archäologischen Arbeiten an Anomalem Objekt 8396-DE.

Site-Director: Dr. Linda Licht

Head of Management: Gisella Schwartz

Head of Security: Lutz Becker

Head of RTF DE25-𝖀 (25-Ulf "Ultramarin"): Major Ingeborg Kahl

Head of Research and Developement: Dipl. Ing. Johannes Schweinsteiger

Head of Infirmary: Dr. Franziska Krieg

Head of Logistics: Benjamin Wurst

Head of Maintenance: Daniel Wild

Head of Planning and Construction: Herta Fromm (in cooperation with MTF DE25-𝔑 "Nemos Crew")

Staff on-site

    Doctors: 12

    Researcher: 34

    Administrative Personnel: 9

    Maintenance and Supply: 45

    Security Personnel: 50

    D Class: 15
    Construction Personell: 16

    Other Personell: 23

Anomalies housed in Site-DE25.

ID # Object Class
SCP-183-DE3 Safe
SCP-005-INT4 Thaumiel

Additional Information

Site-DE25 was built for the Germanophone Foundation's presence in the North Sea, thereby facilitating the observation of anomalies located here. Construction of Site-DE25 began in 2012 and was initially carried out using SCP-005-INT technology alone. However, because the device is only capable of manipulating things underwater, an additional construction crew was needed to build the access platform. Construction was completed two years later.

In 2016, a minor incident occurred when a submarine in the harbor suddenly sank, blocking one of the exits. It turned out that the vehicle had been affected by an anomaly causing rapid rust. The vehicle was declared lost and, over the next two months, was broken into transportable pieces that were distributed on the seabed as part of an experiment off the site. As expected, the pieces were then further disassembled by the site's drones and shipped to Floor U-6 as resources. Similarly, the machines have since proceeded with all wrecks sinking in the immediate vicinity of the site unless they are recovered within two hours. So far, it is unknown whether and how this function can be switched off.

As of 2019, a new modification to the [[[SCP-150-DE]] model Sinbad is under development at site-DE25. This unit is designed for underwater exploration and, according to initial simulations, can dive to depths of up to 450 meters. So far, however, only prototypes of this modification exist. If this project is successful, the research management plans to develop the "Störtebecker" series of models, power armor designed for underwater combat.

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