Ranked #51 on the list Best Measuring Instrument of All Time

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About Mooring

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A mooring in oceanography is a collection of devices, connected to a wire and anchored on the sea floor. It is the Eulerian way of measuring ocean currents, since a mooring is stationary at a fixed location. In contrast to that, the Lagrangian way measures the motion of an oceanographic drifter, see Lagrangian drifter. The mooring is held up in the water column with various forms of buoyancy such as glass balls and syntactic foam floats. The attached instrumentation is wide ranging but often includes CTDs (conductivity, temperature depth sensors), current meters (e.g. acoustic Doppler current profilers or deprecated rotor current meters), biological sensors, and other devices to measure various parameters. Long-term moorings can be deployed for durations of two years or more, powered with alkaline or lithium battery packs. Moorings often include surface buoys that transmit real time data back to shore. The traditional approach is to use the Argos System. Alternatively, one may use the commercial Iridium satellites which allow higher data rates. In deeper waters or areas covered by sea ice, moorings are often completely submerged with no surface markers. Submerged moorings use an

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