MELOA offers a solution to extend and improve the current in situ ocean observing and monitoring systems, in the form of WAVY drifter’s devices. The low-cost, sturdy and multi-purpose surface drifters are a new generation of sustainable platforms, easy to embed in different types of marine observation systems. Main attributes: ► Small-sized, making the WAVY very easy-to-handle ► Optimized buoyancy, reducing the WAVY vulnerability to direct wind effect ► Minimized pendular motion, facilitating the WAVY position detection 4 types available: WAVY Basic: GNSS, GPRS, 1 thermistor WAVY Littoral: GNSS, GPRS, IMU (MEMS) WAVY Ocean: GNSS, adjustable ballast module, 2 thermistors (near sea-surface temperatures), satellite communications, IMU, solar panels WAVY Ocean-plus: GNSS, adjustable ballast module, 2 thermistors (near-surface sea-temperatures), satellite communications, IMU, solar panels and wave energy harvesting