26 st / February 2017 www.sea-technology.com
cation systems with integrated measuring platforms. The
counterfill work reduced the risk of future wreck and sedi-
ment movement, including materials contaminated with
This enables the responsible Norwegian authorities to
evaluate and prepare the next steps toward final elimina-
tion of contamination risk in the environment. ST
Data from the surface buoy was relayed via Iridium satel-
lite communication to servers, with one system located at the
NIVA office in Oslo and the other one on board the offshore
Measurement data violating the threshold limits caused
the transmission of SMS messages to key personnel. In ad-
dition, a visible and audible alert was provided, triggering
additional water sampling at the location of the threshold
violation and later analysis of the mercury load of the col-
Data were visualized and made accessible via a Web por-
tal hosted on the server at NIVA in Oslo.
At the end of June 2016 the project was successfully and
safely completed ahead of schedule. The monitoring sys-
tem reliably provided data throughout the entire counter-
fill installation. Monitoring and data analysis showed that
mercury-contaminated sediment did not spread during the
work done to stabilize the wreck.
With this project, develogic has set new standards for
large-scale and highly complex underwater communi-
Markus Motz is the managing director and lead de-
sign engineer of develogic, located in Hamburg, Ger-
many. Motz graduated with a degree in aerospace
engineering at the University of Stuttgart. Since 2000,
develogic focuses on the development of turnkey sys-
tems, enabling subsea data collection and real-time
data transmission to customers.
Thomas Radtke is the lead software engineer at de-
velogic. He graduated with a degree in computer sci-
ence and engineering from the Hamburg University
of Technology. Since he joined develogic in 2008, he
has contributed to numerous projects for customers
in marine science and the offshore industry.
"The challenge of this project was to design a robust multinode subsea communi-
cation network around the operation area that takes minimal installation effort."