Page 15: of Marine Technology Magazine (May 2021)

Hydrographic Survey Sonar

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Jim Thomson read- ies a ? xed mooring equipped with a

Signature500 ADCP for deployment in the Beaufort Sea.

The instruments were left in situ for a year.

Professor Thomson has been research- ing wave and sea ice conditions in the 0LFUR86%/7UDFNLQJ%HDFRQV

Arctic for a number %LGLUHFWLRQDO$FRXVWLF'DWD0RGHPV of years.

Photo ©: Onpoint Outreach. Photo ©: Onpoint Outreach.

hour. “They have been great for power management. It’s really good to be able to 3RUWDEOH6LGHVFDQ6RQDUV have the instruments reliably collecting data for a whole year and retain robustness 7RZHG2(0+XOODQG3ROH0RXQWHG in the data collection,” Thomson says.

The Signature1000s have also been attached to moorings to assess waves in shal- lower waters. In the Chukchi Sea, Thomson and Dr Lucia Hošeková captured a four-day-long wave event near the Alaskan coast, allowing them to explore how sea ice dampens the wave’s energy.

“A next-generation acoustic pro? ler that really moves things forward”

Thomson’s Arctic investigations are continuing, with much of the research be- ing conducted largely made possible by the technical advances being made in the equipment. “The Signature instruments, in general, have been nothing short of a game-changer,” Thomson says, noting the ability of the instrument to capture mul- tiple different types of measurements. “We have a next-generation acoustic pro? ler that really moves things forward. The data are much cleaner, much higher quality than they used to be.”



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