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so the two main sensor technologies we ve got are the active sonars we re using for tracking seals, primarily, so they don t make much noise underwater, so these send out a very, very high frequency ping which is too loud for the animals to hear and be disturbed by, and they listen for the echo, and they can build up an image of exactly where the animals are around the turbine. on the other sensor that we ve got it is underneath this protective housing here, which is passive hydrophones, which are listening to the sounds the animals make and we use those to pick up the sounds of porpoises and dolphins. john o groats, it s here that the monitor will be sung underwater and installed on the seabed next to the turbine. it s sam, the ship is out at sea, we re here on land waiting for the signal and that s because there is only a certain number of opportunities for the equipment to be submerged underwater and onto the seabed because of tidal conditions. but there s a delay. the turbine must

Sensor technologiesNoise underwaterTracking sealsDisturbed byPassive hydrophonesLand waitingJohn o groats