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11 th International Symposium for GIS and Computer Cartography for Coastal Zones ManagementFlexible system configurationThese ocean RADAR systems are very flexible and can be configured with compact antenna systems or with arraytype antennas. This allows one to adapt the configuration to the individual requirements. The small antenna designsimplifies the deployment (Figure 1D), even the integration of the antennas into existing structures is possible.Mobile, rapid deployment systems with small and light antennas demonstrate that it is possible to get such aninstrument operational within a few hours. For long term installations more robust antennas are used. The power ofthe transmitted radio wave is below any critical level (< 30 W) and allows the installation even within range of thepublic.(A)(B)(C)(D)Figure 1. (A) Operation principle of Ocean RADAR. (B) Ocean Current map generated by ocean RADAR WERA at the coastof France near Brest – data courtesy ACTIMAR. (C) Comparison measurement with an ADCP about 30 km offshore as groundtruth (correlation factor 0.947) – data courtesy ACTIMAR. (D) Compact antenna array at the beach of Tannum Sands, Australiafor current measurements at the Great Barrier Reef.106