Author_Institution :
Minist. of Agric., Fisheries & Food, Lowestoft, UK
Abstract :
An instrumented tetrapod for recording water velocity and other parameters near the sea bed is discussed. It has been developed from a shallow-water system with a life of weeks. Sensors used include electromagnetic current meters, transmissometers, a pressure transducer, acoustic backscatter probes, miniature optical backscatter units, roll and pitch potentiometers, a temperature thermistor, a water sampling device, an acoustic altimeter, and a still camera and flash. The sensors are discussed. A redesigned system is described. Launch and recovery technique, as well as data handling, are discussed
Keywords :
oceanographic equipment; acoustic backscatter probes; current; data acquisition; instrumentation; instrumented tetrapod; near bed recording system; ocean; optical backscatter; seafloor; shallow-water; temperature; water sampling; water velocity; Acoustic devices; Acoustic sensors; Backscatter; Disk recording; Electromagnetic devices; Instruments; Optical recording; Optical sensors; Temperature sensors; Thermal sensors;
