The water currents in the Baltic Sea are studied experimentally with the use of different types of floating drifters. A set of ten drifters was deployed multiple times from mid June until the end of September 2010. Drifters were always deployed in pairs or triples and with a distance of about 150 meters from each other.

The main objective is to determine the pair/triple separation in the first couple of days.
The drifters with their original setup and configuration are briefly discussed. The experiments chronicle is presented with some examples of the datasets. Some ideas of processing the data are suggested for future work. The results of the experiment will be used to verify the results of numerical simulation of the particle tracking (TRACMASS model).