Recent advances in wave buoy techniques at the national institute of oceanography

The well-established Doughnut and Cloverleaf wave buoys developed by N.I.O. are described briefly and details of a disposable wave buoy, at present under development, are given. Because of certain operational difficulties experienced with the Doughnut buoys, a digital telemetry system has been developed and this is described in full detail. The system allows for simultaneous sampling of up to 10 analogue channels, at 0.25 second intervals, with 0.2% accuracy.