Sea Technology

AUG 2017

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www.sea-technology.com August 2017 / st 15 C limate change is just one of the challenges that ports in Chile increasingly have to deal with, and investment in the latest Doppler technology and online systems has proven to be a significant benefit for its ports. These same technologies can also help Chile's aquaculture industry. From the early 1990s to 2007, Chile's aquaculture took off, and by 2006 Chile was producing 38 percent of the world's salmon. Now, the country produces 1.4 million to 1.5 million tons of salmon a year, putting it on a par with the world's biggest producer, Norway. But there is still significant potential for Chile to run its aquaculture operations more efficiently and profitably. Nortek's Doppler technology has already helped improve safety and efficiency in Chilean ports. Now, Chile can improve the performance of its aquaculture by fully adopting this technology to measure waves and currents. Measuring waves and currents helps with issues such as cal- culating the most effective location of the cages' moorings, the shape of those cages and the position of floating barges. It also helps fish farmers economize on fish fod- der. Typically, fishmeal is unnecessarily wasted during the feeding process, as currents draw the pellets through the cages' netting. Constant measuring giving real-time data can be supplied via Nortek's AWAC and AOS systems and by the Aquadopp current profiler. Data from these systems informs when and from what position food can best be released and where and when to position the cameras to reveal when the fish are finished feeding. Nortek's representative in Chile, Mariscope Ingenieria SPA, has done a study that found that using this equipment could reduce food loss by up to 20 percent—big financial savings for any fish farm operator. Lack of Reliable Data At the moment, many aquaculture sites in Chile still rely on spot measurements, meaning that they really don't have enough reliable data to make informed decisions, and guesswork comes into play. The situation is somewhat different in Norway. The con- trast between efficiency levels in Norwegian and in Chil- The Right Measurement Tech Can Boost Chilean Business Wave, Current Measurements Increase Efficiency of Ports, Aquaculture By Christian Haag (Top) The AWAC in front of a ship loader for copper minerals in Chile. This ADCP helps ship operators position their ves- sels in a safe manner during loading operations. (Bottom) The AWAC 600-kHz ADCP has become the standard reference technology in submerged wave-measurement applications in ports and other sites. Thousands of Nortek's AWAC ADCPs have been deployed to capture the full wave spectrum in com- bination with current profiles.

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