The Baltic Sea Anomaly




The Baltic Sea anomaly refers to an object found by the Ocean X diving team in the Northern Baltic Sea at the center of the Bothnian Sea in June 2011.

Ocean X is a treasure hunting company lead by Peter Lindberg and Dennis Asberg and is specialized in the retrieval of objects from sunken ships.

They use sonar and radar equipment and a team of divers to locate and investigate wrecks. The sonar images of the Baltic Sea anomaly showed a circular object with unusual features indicating something that is not created by nature but more likely man-made or as some suggested made by extraterrestrials.


  How the Baltic Sea Anomaly was discovered

The Baltic Sea Anomaly - how it was found 


The team suggested their sonar image showed an object with unusual features of seemingly non-natural origin, prompting speculation published in tabloid newspapers that the object was a sunken UFO.

- Wikipedia


The 3-D sonar scans revealed smooth walls and straight corridors all over the surface of the object. Some of the edges reflected the sonar waves in a more intense way indicating the possible existence of a much harder material under the surface, possibly metal. The walls of the corridors are perfectly straight and have right angles to the floor.



Map where the Baltic Sea Anomaly was detected

Aproximatedly the place where the Baltic Sea Anomaly has been found


Dennis Åsberg said: "When we went out and saw the walls which were straight and smooth, it was frightening, as in a science-fiction film".

The object has a diameter of 60 meters (196 ft.) and lies about 87 – 90 meters (285 ft. – 295 ft.) under the surface of the sea. There is a second similar piece detected about 200 meters (660 ft.) away, which has a diameter of 40 meters (130 ft.). Judging on the two 1500-meter (5000 ft.) trails leading to each of the objects, they seem to have both crashed at the same place before sliding to their final destination leaving deep trails behind in the seabed. It is quite possible that they were one single object before the crash.

There are many theories on what the Baltic Sea Anomaly could be, but none of these theories are final as there is not enough information for a clear-cut conclusion. The objects are very deep under the surface and difficult to reach. There have been no overview pictures as it is too dark and murky. For now, we can only go by the sonar images made public by Ocean X, which unfortunately are plagued by a number of distortions caused by equipment calibration issues.

This document is my attempt to analyze what the Baltic Sea Anomaly could possibly be and to illustrate my thoughts on what I see in the object. It is not a real open-minded analysis, as I will not go into any of the other possibilities people suggested. In fact, I am not going beyond illustrating my own initial thoughts on what we are dealing with. As a disclaimer, I would like to add that this document is not meant as a fair analysis as it is jumping quite rapidly to a single conclusion.



Many theories


The Millennium Falcon from Star Wars
                                     The Millennium Falcon from Star Wars

Having a quick search on Google for The Baltic Sea Anomaly results in a large number of explanations with some very far-fetched theories. These theories include Atlantis temples, UFOs (the Millennium Falcon) and volcanic rocks.


The Baltic Sea Anomaly on Google


The Baltic Sea Anomaly seems to have no purpose in its current location and it would, therefore, be more likely that an accident happened during transport, which caused it to sink and break apart. The 1500-meter trail on the seabed is very puzzling as it is unclear how such a heavy structure could slide for such a long distance. Some researchers reason that glaciers could have dragged it during the ice age, which would definitely explain the trails. However, the problem with that theory is that the structure would have been built on dry land when the Baltic Sea was still dry and it would, therefore, be thousands of years old. It would place the Baltic Sea Anomaly in a time period that humanity did not yet have the ability to create such structures and it would conflict with our current accepted history. This theory, therefore, creates more questions than it answers.

Although it would be very exciting if the Baltic Sea Anomaly would be extraterrestrial or a temple from Atlantis, I fail to shoehorn my observations into such far-fetched ideas. My conclusions on what the Baltic Sea Anomaly could be are much closer to home and indicate a much more recent time period for its construction.


The method used

The method used in this document is to compare the form and patterns found in the features of the Baltic Sea Anomaly to known objects. The idea is to use the similarities to answer the following questions:


  • What is the Baltic Sea Anomaly?
  • How did Baltic Sea Anomaly arrive at its current location?
  • What was the purpose of the Baltic Sea Anomaly?


The method used is simplistic and generally has a limited usefulness, but with this visually striking Baltic Sea Anomaly, we can actually get rather far in our deductions. The main characteristic features of the circular object are the straight lines forming rooms and corridors. These line patterns create features that can be compared and matched up to characteristic features found on other similar, man-made objects and especially with seaside bunkers and fortifications. These similarities we will use to shed light on what the Baltic Sea Anomaly could be.

To start answering any of the above questions we first need to have a better idea of what the Baltic Sea Anomaly looks like. For this, I created a virtual model using the measurements calculated from the sonar images. The tape measurement tool of Google Sketch-up was used to measure each of the corridor walls and features found on the object. The calibration of the Sketch-up tool was based on the initial estimation given by the Ocean X team that the Baltic Sea Anomaly is 60 meters in diameter.



Measuring the Baltic Sea Anomaly in Google SketchUp

 The Baltic Sea Anomaly - measuring the object in google sketch-up


The methods used did not result in creating a perfect copy, as there are many factors causing distortions. The starting challenge was to read and understand the original sonar images. These images were vague and distorted because of calibration issues with the sonar device. Further challenges were related to the modeling process itself. It was an artisanal and manual process and includes many assumptions, trade-offs, and interpretations. As a result, the final virtual model is far from a true representation of the original Baltic Sea Anomaly. Keeping that in mind I do think the model resembles the original object enough to give an idea of its possible purpose.



The Baltic Sea Anomaly - general measurements
Type  Meters   Feet 
Main disk shaped object - diameter 60 196,9
Main disk shaped object - thickness 4 13,1
"Pillar" or Layer under the disk shaped object 9 29,5
Diameter of round platform with arched beam 15 49,2
Height of Corridor walls 1,5 4,9
Width of Corridors walls - wide  3  9,8
Width of Corridors walls - small  1,8  5,9



Modelling process of the Baltic Sea Anomaly

The Baltic Sea Anomaly - the modeling process 


The advantage of working from a virtual 3D object is that it can be manipulated and seen from many angles while it can also be “dressed up” and placed in its natural (virtual) environment making it easier to understand its original role and purpose.

Two of the sonar images released by Ocean X have been used as our basis for creating the virtual model of the Baltic Sea Anomaly. The first image has more details but contains distortions caused by calibration issues with the sonar device, while the second image is very vague. Compared to each other they show significant differences. Therefore the vague image has been used to correct the detailed image before creating the model of the Baltic Sea Anomaly.



The Baltic Sea Anomaly from wireframe to 3D model

Modeling a virtual model of the Baltic Sea Anomaly 


I modeled the virtual object in Blender (version 2.79). Although much attention was given to details there are some small omissions that were not picked up until a later stage when it was not anymore time-effective to go back and update the model. In case of doubt please always refer back to the original sonar images. The resulting virtual model is now used as the basis for the analysis and is compared with historic objects that may help to discover the purpose of the Baltic Sea Anomaly.



"The images has previously shown defined 90 degree angles. Many 90 degree angles and straight lines: .5 – 1.5 meter ( 1.5 to high 5 feet) corridors within object. They appear to be like passages or walls approx. 1.5 meters in height and 3 meters (10 feet) wide, which are cut into the object. The walls are straight and smooth. The walls are made of stone resembling sandstone."

- youtube video, Peter Lindberg


The Baltic Sea Anomaly is 4 meters high and rests on a what looks like a pillar or an additional layer with a different diameter which lifts the object about 9 meters from the seabed.




The Baltic Sea Anomaly as a bunker or as a coastal defense structure


The Baltic Sea anomaly consists of 3 objects located close to each other. There are only sonar scans available for two of these objects.

The first object is the main object and publicly the best known. The second object is about 200 meters (656 ft.) away and has a diameter of 40 meters (130 ft.) and has more or less the same outline. There is very little known about this second object and no detailed sonar scans have been released. It is quite possible that the objects were joined together as two components of a larger structure.

The depth of the corridors on the main object is about 1,5 meters, which is not enough height for a normal human-sized passage. However, if the two objects fit together having the same corridors and spaces left out, then the combined height would be 3 meters, which is a comon height often used for corridors and rooms.

Dennis Åsberg of the Oceans X team commented that there are many indications that the objects seem to be part of a man-made building.

Both objects could have fitted together sitting on top of each other. In that case, we may be looking at a construction or building made out of large components. The weight and size of these objects are massive and must have made it very difficult to transport and prone to accidents. Component-based construction makes a lot of sense when using small to medium sized components. Beyond a certain size and weight, it becomes a very challenging task to transport and assemble.



Airfix - coastal defence fort
The Airfix 1/72 coastal defence fort from the Airfix Tribute forum



The preferred way for building, in general, is to do all the work at the final destination. Small to medium-sized components like walls are often pre-fabricated and then transported and assembled on site. The size of these components is limited by transport and technical know-how. Large constructions need tons of materials and a team of experienced builders.  Large components as  the Baltic Sea Anomaly would create unimaginable challenges. It would be hard to construct in one location and then transport to the final destination where it will need to be assembled. You would need a sizable team of engineers and specialized equipment for these complicated tasks. If we are indeed looking at a construction consisting of multiple components then it is more likely that there was an accident during transport. This would place the structure in a far more recent time period.

The only reason, I can think of, for justifying working with a component that has a 60-meter diameter, is if it would be related to a secret military operation. The military employs its own engineers but does not normally employ its own builders. It is usual that the military uses civil contractors for construction work. If the construction and its location would need any form of secrecy it would make sense to create the components in a factory far away before shipping it out to its final location where military engineers can mount and assemble the components in a record time. Military personnel is bound to secrecy while civil contractors are more difficult to control.




The Baltic Sea Anomaly as the ceiling of a bunker


My first impression looking at the Baltic Sea Anomaly is that it resembles the upside-down roof of a 19th or 20th-century bunker and we are looking at the underside of the ceiling. It is a structure similar to the ones used during the two world wars. At least 4 key features of the main object resemble those that can be found on bunkers still located all over Europe. The two objects could be part of the same round bunker as they have the same outlines and could possibly fit together as two halves of a cake. The corridors and rooms could be left out on both of the halves and when fitted together the height of each room is the sum of the spaces left out. The sizes of the rooms and corridors are not uncommon for bunkers and fortifications

At this time there is not enough information on the second object to verify if the corridors found in the first object are also spared out and that they are indeed matching.



The Baltic Sea Anomaly as a bunker

 The Baltic Sea Anomaly as the ceiling of a bunker or coastal fortification


There is a 3-meter wide dome located on the main object. It is not known if there is a matching hole in the second object. The two objects could have been designed as pre-cast concrete structures that are interlocking. In that case, the ball and hole could serve as a dowel joint to position and fit the two concrete slabs together.



Connecting the two Baltic Sea Anomaly objects together 

 The Baltic Sea Anomaly - fitting the two objects together



The round platform with the arched beam

An arch is a curved structure that spans an elevated space and may or may not support the weight above it. - Wikipedia

On the main Baltic Sea Anomaly object, there is a round structure with something that looks like a bent/arched beam. An arch is usually used to support the weight above it. Arches can take a lot of force but only in a single direction, a force applied in the opposite direction would break the arch. The bent beam in the platform indicates that the force needs to come from the other side of the platform. That would mean that the disk is lying upside down and we are looking at the bottom of the platform.

The platform has a diameter of 15-meters (49.2 ft.) and could have served as the base for a pillbox or air defense. Such defensive structures are common features on coastal fortifications.

Alternatively, the platform may have been located above a shaft as support for a lift mechanism. A shaft would indicate a deep underground military base (DUMB). I doubt that this would have been the case. A shaft leading to an underground base would have been the most important part of the structure. The role of the bunker would then have been to protect the access to this shaft. You would therefore expect the platform and shaft to be located in the middle of the bunker where it would have been best protected by the largest amount of reinforced concrete and not located on the outer edge, as is the case with the current design.



Baltic Sea Anomaly - measurements of the round platform
Type  Meters   Feet 
Diameter outer ring 15 49,2 
Diameter inner ring 13 42,7 
Width of arched bean 3 9,8 



The Baltic Sea Anomaly upside down

The Baltic Sea Anomaly shows features that are comon on bunkers and coastal fortifications 



The staircase – loophole for artillery

One of the key features of the Baltic Sea Anomaly is something that resembles a 14-meter wide staircase connecting to the outside. There are 7 steps, each having the same dimensions and each step showing a large drop. This drop from step to step is too much for a staircase but would be in line with the type of overhanging stacked ledges commonly found on WWII bunkers to protect artillery from shelling as can be still seen on historic bunkers all over Europe.



Protective layered ceiling for artillery 

 How the Baltic Sea Anomaly could have been the ceiling part of a bunker or coastal defense structure


The Baltic Sea Anomaly - Measurements of the artillery stand
Type  Meters   Feet 
Largest width 15 49,2 
Depth 14 45,9 
Number of steps - 7     
Width of each step 1 3,2 
Rise of each step 0,5 1,6 


Large defensive lookout post

This space is perfectly suited for defense, as it seems to have access to the outside and could have served as a large lookout. The ceiling width is almost 7 meter between the room and the outside and there is enough space for artillery.



The Baltic Sea Anomaly - the large loophole

 The Baltc Sea Anomaly shows feature that could possibly be features of a bunker or a coastal defense fortification



Ammunition depots

Behind the place with the “stairs” there are to two large rooms connected by corridors. One room is close to the entrance and could have been used to store ammunition for immediate use. The second room is further away and could have been used as a backup.



Key features on the Baltic Sea Anomaly

- that could posibly indicate we are looking at the underside of the ceiling of a bunker





A floorplan from the Baltic Sea Anomaly 






The Baltic Sea Anomaly seems to have a loading bay with storage rooms



The "loading bay area" is another key feature of the Baltic Sea Anomaly and includes pre-indented spaces that could be used for storage. These spaces are located at the back of the area on the sidewall and the back wall.

One of the indents is a 2 by 2-meters room at the back of the sidewall while the other space in the back wall is 2.5 by 2.5-meters.

The larger space is ideal for storage of incoming goods while the smaller space on the side would work perfectly as a temporary storage space for outgoing waste products.

A loading bay is not unique to a bunker. It is a common feature found as part of many constructions including warehouses, markets and harbors. Identifying a loading bay or loading space on the Baltic Sea Anomaly is a game changer, and is clearly pointing at the object being a man-made structure.



The Baltic Sea Anomaly - measurements of the loading bay
Type  Meters   Feet 
Loading bay - width 15 49,2 
Loading bay - length 23 75,5 
Storage spaces distance from ceiling 1 3,2 
Ceiling beam length 6 19,7 
Ceiling beam width 4 13,1 
Storage space for incoming goods - width 2,5 8,2 
Storage space for incoming goods - depth 2,5 8,2 
Storage space for outgoing goods - width 2 6,5 
Storage space for outgoing goods - depth 2 6,5 


Loading bay gif 


Baltic Sea Anomaly - Loading bay



The Baltic Sea Anomaly - the loading bay



The Baltic Sea Anomaly Loading Bay 



The Baltic Sea Anomaly Loading Bay



The Baltic Sea Anomaly Loading Bay



The Baltic Sea Anomaly Loading Bay 






Judging by the features of the Baltic Sea Anomaly, it is quite possible that we are dealing with a man-made structure. There are at least four key features that, with a little imagination, would fit well on a coastal defense bunker. Especially if we take the object as the upside down ceiling slab for such a structure.

There is no further information or hints on how such a large and heavy object arrived at its current location while leaving a long trail on the seabed.


Where to go from here

Is anyone missing a bunker? Research would want to focus on missing objects from the second world war. Did a bunker got lost during transport?






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