Strange underwater sonar image

Today a team of explorers are leaving the Swedish port of Norrtälje and are going to be getting to the bottom of a mysterious object they came across this time last year 65m down in the Baltic Sea. The radar image is unclear but theories have ranged from the millenium falcon to a plug in the bottom of the ocean. Well in another couple of days we will find out once the team have got back to the site and sent down an ROV to explore it.

Peter Lindberg's Sonar Image of anomoly on Baltic Sea


Personally I think it might be an ancient settlement of some kind, because before the 2km thick ice sheet melted that covered most of the northern hemisphere at the end of the last ice age, the sea level was about 120m lower than it is today. As the North Sea that divides the UK and Europe was a mass of open land back then called doggerland, it is not that far from the area this is located at and would likely have had some of our ancestors living there. The size of the anomoly would indicate it is an area that a small group could live in, as shown here on the comparison with a Boeing 747 from the Ocean Explorer team’s website. I am just speculating though based on evidence of other settlement areas found and studied around the world between 40m and 120m deep as it may just be a rock formation that randomly formed through deposition and erosion to create this strange anomoly that is less clear than man made anomolies on the radar images.

Comparison of Boeing 747 and anomoly size. Ocean Explorer image from


You can follow these guys on the Facebook group page or keep up to date on their website or follow their latest discussions at

Good luck to them, and as the world is watching we can all hope the weather holds out for them to study this anomoly.




May 30, 2012

Robotic fish in sea trials.


If it looks like a fish and swims like a fish, is it a fish?

SHOAL Robotic Fish Trial Launch

SHOAL launch

Not in this case, British consultancy BMT Group have been leading a project developing a robotic fish to aid in pollution detection with European scientists from different universities and organisations. Working as a shoal they can intelligently map and navigate an area, giving a second by second update of the quality of the water and even track down the source of any pollution it finds. An invaluable tool for any port authority or business that has discharge into a water course or marine environment.

The project is actually called SHOAL and is the collaboration of the years of research and development that has gone into the various aspects of what make this such a good tool. Using the latest robotics, artificial intelligence, chemical analysis, underwater communication and hydrodynamics they have managed to produce a robot that will blend into the marine environment and go about doing what it does best, taking on-board chemical analysis of the water it is swimming in and send that data back to the surface station, either by itself or through the shoal advanced communication system.

Reuers/SHOAL Consortium image of SHOAL

Undated photo of Reuters/SHOAL consortium handout on Robotic pollution monitoring fish

Other uses that have been suggested for this tool include diver monitoring, underwater security and search and rescue at sea (according to Reuters here)

 You can find out more about this remarkable new tool that was tested in the sea for the first time on Tuesday at the SHOAL website here


May 27, 2012

Dive sites for satnav POI’s

We will be setting up satnav POI’s (Points of Interest) using POI Editor which can be found here for dive sites we visit.

They will be downloadable as POI’s from on the overall map and you are free to share them with other divers.

Included on the downloadable POI’s will be the dive shops with air refills and kit hire and any parking for that shop.

On each location you will see an info box which you can click on the name and it will take you to that locations close up map showing the nearest car park, cafes, toilets, phone box; leading to the dive sites entry points..

The POI Editor allows us to save these in various formats for the different satnavs available and the following formats will be available to start with:

TomTom .ov2

Navman .csv

Garmin .csv

Google Earth .kml

If anyone feels we miss one they can use please let us know.

If anyone would like to join the site and include their dive locations as POI’s on our map we would be happy to talk through the simple use of POIEditor as well as ensure a standardisation is met across all dive locations.


We are doing this in good faith to share information about dive sites but if you choose not to download them from the originals stored here on we cannot be held responsible if they contain anything that could cause your satnav to fail. We hope that the diving community understand this and if they do share them, that we encourage, it is done so without tampering with the files. The files we upload will be virus scanned before we let them go live but while every effort is made to ensure they are safe for your computers and satnavs we cannot be held responsible for any tampering of the files that may occur after we have uploaded them.