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Image courtesy of TechWorks Marine minutes) from which are derived nominal wave spectra. Hard- ware is based on wave staffs, wire gauges, buoys or underwa- ter acoustic sensors, but device cost means that measurements are made at a single point. These existing techniques have de- ? ciencies: (i) many of the most dangerous wave classes on the ocean either cannot be measured at all or are inaccurately recorded because of sampling de? ciencies; (ii) existing wave buoys cannot reliably measure processes such as wave break- ing or rogue waves which are all better characterized as instan- taneous phenomena and which do not appear in average wave spectra; (iii) sensor cost precludes wide area deployment and inhibits measurement of full spatio-temporal wave evolution

AN RJE Pinger is dynamics. Buoys only measure accelerations, and a double in- your insurance tegration provides displacement. Also, the buoy sensor in the policy case of a usual Datawell is gimballed in the buoy and can pro- duce spurious large values if the buoy is rotated. Satellite mea- surements (altimetry) only provide signi? cant wave heights.

Never lose sight of what you need.

The Irish winter of 2013-2014 was severely affected by many • Easily mark or relocate anything storms due to the atmospheric jet stream extending right over in the water

Ireland carrying successive storms. This exceptional weather combined with high tides resulted in serious coastal damage • Assortment of off-the-shelf and widespread ? ooding. An altimeter pass in the Eastern At- pingers lantic detected phenomenal signi? cant wave heights near 19m • Capability to develop specialty just west of Ireland. products

Prof. Frederic Dias from University College Dublin then decided to organize a measuring campaign for the following winter (2014-2015). He concluded that the best instrument to capture extreme wave events off the west coast of Ireland

RJEInt.com | 949-727-9399 was an Acoustic Doppler Current Pro? ler (ADCP). In collab- oration with Teledyne RD Instruments (TRDI), a Sentinel V www.marinetechnologynews.com

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