Lecture in the International Conference on Underwater Acoustics-21 (June 2021):Irina Bjørnø and Leif Bjørnø✝. Underwater hazardous materials mapping (UHM) are necessary steps for secure future.

1. Underwater hazardous materials mapping (UHM) are necessary steps for
secure future
Irina Bjørnø and Leif Bjørnø†

2. How all started -L.B archives

3. Baltic sea - area of interests - GAS-21

4. Damping of weapons after WW2
✤ Damping map

5. Historical “damping” of UDO
✤ shades from WW2

6. What is in te bottom of Baltic? UDO!
German military archives also contain evidence that in 1945 Nazi Germans dropped 69,000 artillery shells
containing nerve agents and phosgene near Bornholm.
After 75 years, rust and salt water begin to "reveal" their underwater secrets, poisoning the calm Baltic waters.
The Soviet Union buried in the Baltic Sea in 1945: 71,469 aerial bombs with mustard gas,
14,258 chloroacetophene bombs,
8027 adamsite bombs, 408,565 artillery shells with mustard gas,
34,592 artillery shells.
That's not all.
There were 10 420 chemical smoke mines,
1 004 containers with 1 506 tons of mustard gas,
8 429 barrels with 1.030 tons of adamdamsite and divinylchloroarsine,
169 tons of containers with cyanide salt, chloransin and cyanarsin.
It is also reported that the Soviet Union flooded 7,860 boxes of cyclonic gas in the Baltic Sea.
Cyclonic gas was used in 300 concentration camps to poison prisoners in gas chambers.

7. How it happened?

8. Map of Baltic UDO now
✤ Look at yellow and red spots

9. Images of UDO in the bottom of Baltic

10. UDO imaging 2020 in Baltic sea bottom

11. Form bottom with love - 2020,
November. Enigma

12. Underwater acoustic mapping is one
of the possible solution
Underwater Acoustical methods are able to help us to found
and make possible the identification of the UDO - potentially
dangerous hazard object and make mapping of the bottom
and under.
Acoustical mapping of the bottom of the Baltic sea and public
attention to the present situation will create the background to
the international collaboration and legislation to “clean” the
Baltic bottom area from potential dangerous objects and
create the condition to the safe underwater environment.

13. A new branch of science is needed.
A new science “Underwater Objectology” is needed at
present time, where the efforts of different branches of
science can be added- including UA (underwater acoustics)
to make safe underwater environment for future time.
Such conference as UA can be the part of big international
community discussion the safety of underwater environment
using modern technology of Acoustics to monitor the
underwater potentials dangerous objects (UDO).

14. Conclusion
The Baltic Sea is, unfortunately, currently the most
polluted sea on our planet!
And it's also a ticking bomb! Right next to the Nord
Stream 2 gas pipeline.
And nearby are lobsters and the famous Bornholm
trout, which you may be eating with your guests
right now.

15. Leif Bjørnø Students Price
competition in UA
About International Leif Bjørnø Students Award
Leif Bjørnø International Student Award “FOR BEST
GRADUATE STUDENT PAPERS“ was established in
2017 as a part of Underwater Acoustics Conference, -
UACE - to boost the interest in Underwater Acoustics
from young scientists.

16. About L.B. Students award-21
https://belbooks.wixsite.com/leifbjoernoe-award

17. Book of best students papers from UA
conferences 2017 and 2019
✤ https://issuu.com/belbooks/docs/leif_bj_rn__awards_
book_of_paper

18. L.B. Memorial library - for students
✤ will be opened soon…

19. Thank you for your attention!
✤ I hope we can contribute together to create the safe
underwater environment in Baltic. Irina Bjørnø