Customer request

Data transmission in the ocean and lateral acoustic net-work in the deep sea, even under heavy weather conditions. 

Our solution

The DOLAN mooring assembly was located 60 nm north of the Canary Islands and had been installed in framework of the terminated project ”Data transmission in the ocean and lateral acoustic net-work in the deep sea”.

In November 2007 a PACT ocean bottom unit was deployed to a depth of 3,300m in vicinity of the DOLAN mooring. The system was equipped with a HAM.NODE OEM Hydro Acoustic Modem communicating with a HAM.NODE surface modem installed at the DOLAN data buoy. A HAM.ISDB Iridium Satellite Communication Module relayed the bottom sensor data to the AWI in Bremerhaven, Germany. During its adoption the system proved a transmission re-liability rate of better than 98% across a near vertical distance of 3,900m average, even under heavy weather conditions