 The use of microelectronics and technologies with efficient energy consumption allows to increase the types and numbers of sensor deployed on a single device.According to Intergovernmental Oceanographic Commission and World Meteorological Organization (WMO), "ODAS means a structure, platform, installation, buoy, or other device, not being a ship, together with its appurtenant equipment, deployed at sea essentially for the purpose of collecting, storing or transmitting samples or data relating to the marine environment or the atmosphere or the uses thereof.