{"id":40586,"date":"2025-12-03T08:00:05","date_gmt":"2025-12-03T12:00:05","guid":{"rendered":"https:\/\/www.fondriest.com\/news\/?p=40586"},"modified":"2025-12-17T16:42:33","modified_gmt":"2025-12-17T20:42:33","slug":"catching-waves-comparing-buoys-to-deliver-trusted-ocean-data-at-pacwave","status":"publish","type":"post","link":"https:\/\/www.fondriest.com\/news\/catching-waves-comparing-buoys-to-deliver-trusted-ocean-data-at-pacwave.htm","title":{"rendered":"Catching Waves: Comparing Buoys to Deliver Trusted Ocean Data at PacWave"},"content":{"rendered":"

The ocean could power the future. The Inter-Governmental Panel on Climate Change (IPCC) states that the potential for ocean energy easily exceeds present human energy requirements<\/a>\u2013but technology to harness it is still in its nascent phase.<\/p>\n

Growing power demands are forcing rapid innovation across many sectors, including diversifying energy to come from increasingly renewable sources.<\/p>\n

\"The

The small size of the NexSens CB-75-SVS means it can be deployed from a small vessel, but is still visible to maritime traffic. (Credit: Brett Hembrough)<\/span><\/p><\/div>\n

Wave Energy Testing at PacWave<\/span><\/h3>\n

PacWave is the world\u2019s biggest wave energy testing facility. Located seven miles off Oregon\u2019s coast in the swells of the Pacific, it\u2019s the perfect location to put new wave energy converters (WECs) through their paces.<\/p>\n

The PacWave sites comprise a pre-permitted, recently constructed south site that connects to the terrestrial power grid via four undersea cables, and a north site\u2013a patch of ocean designated for testing wave energy converters and supporting technologies.<\/p>\n

Brett Hembrough is the Marine Operations Manager for PacWave. In this phase of the project, with construction complete and operations just beginning, his role includes keeping at-sea assets operational to ensure consistent and persistent measurements.<\/p>\n

Hembrough explains that the PacWave team\u2019s primary objective is to support and facilitate client testing of WEC technology\u2013\u201cWe\u2019re there to get steel in the water for wave energy and measure how that goes,\u201d he states.<\/p>\n

Within this, the team currently has two objectives: firstly, site characterization, and secondly, inter-comparison of wave buoys.<\/p>\n

Site Characterization<\/span><\/h3>\n

Alongside the general testing and evaluation of WECs, PacWave will also offer accredited device testing in conjunction with the National Renewable Energy Laboratory and Pacific Northwest National Laboratory. The accreditation will provide independent verification that WEC devices perform as marketed.<\/p>\n

\u201cThat’s where high-quality met-ocean and wave measurements come into place,\u201d Hembrough explains. \u201cWe need those in order to perform a truly accredited test for these developers.\u201d<\/p>\n

The accreditations require reliable data on environmental conditions at each berth. By quantifying and controlling for any differences between them, developers can be confident that conditions are the same at all locations\u2013or adjust for them in post-processing if they\u2019re not.<\/p>\n

As well as enabling the accreditation, this offers peace of mind to developers, \u201cso that they don’t have to worry that the slot available to install their device in is any different than adjacent sites,\u201d Hembrough adds.<\/p>\n

Device Comparison\u00a0<\/span><\/h3>\n

It\u2019s not just WECs being tested at PacWave, but wave buoys, too.<\/p>\n

Challenging the conventional \u201cgold standard\u201d wave buoys, Hembrough and the team are leaving no stone unturned, pitting buoys from four different manufacturers against each other to see how they compare.<\/p>\n

\u201cWe want to understand if there are nuances or differences, then weigh the pros and cons,\u201d Hembrough says.<\/p>\n

The team considers the \u201csupport cost for larger systems versus smaller systems, convenience of vessel operations, weather, wind, [and] sea conditions that they perform better or worse in.\u201d<\/p>\n

In summer 2024, Hembrough and his team deployed a number of surface wave measurement buoys at PacWave\u2019s south site, ranging from seafloor-mounted platforms to commercially available wave buoys\u2013including a NexSens CB-75-SVS<\/a> buoy that comes ready to deploy straight out of the box.<\/p>\n

\"The

The buoy prepped for deployment in the workshop. (Credit: Brett Hembrough)<\/span><\/p><\/div>\n

NexSens CB-75-SVS<\/span><\/h3>\n

\u201cThere is something nice to say about having a [buoy] pre-packaged, ready to go with the dashboard, firmware, and software [\u2026] versus a more bespoke DIY type of wave measurement,\u201d Hembrough notes.<\/p>\n

With a hull diameter of 21 inches, the NexSens CB-75-SVS comes pre-installed with the SeaView Systems SVS-603HR Wave Sensor.<\/p>\n

So far, the CB-75-SVS has been a \u201chappy middle ground\u201d, where it is \u201cstill small and able to be deployed off of smaller vessels\u201d but sits tall enough in the water to be more visible to traffic.<\/p>\n

Furthermore, the integrated SeaView Systems wave sensor provides inertial wave measurements\u2013generally more trusted than GPS, as it makes direct measurements, rather than deriving values. This is an advantage as data will be relied upon for the accreditation tests.<\/p>\n

Refining Buoy Systems<\/span><\/h3>\n

Hembrough is realistic about the challenges of deploying new systems and the refinement required\u2013\u201cany new device is going to have some iterations on it,\u201d he highlights.<\/p>\n

Where adjustments have been needed to the CB-75-SVS, the NexSens team has been \u201cresponsive and supportive in a timely manner\u201d and \u201cresponsive to feedback.\u201d Working together, they\u2019ve made adjustments to the system, including modifying the mounting location of the data logger antennae to improve data transmission.<\/p>\n

They\u2019re also assessing the small things the team can \u201ctweak here and there to try and get the most wattage out of the buoy for the longest time.\u201d Off Oregon\u2019s foggy coast, this is particularly important to the system\u2019s sustainability.<\/p>\n

Finding the Best Wave Measurement Solution<\/span><\/h3>\n

Hembrough is clear that data, rather than market trends, is guiding the team\u2019s decisions. Where different buoys serve different niches, multiple systems could be employed in tandem, with one system providing \u201cbackbone\u201d data, and smaller buoys that can be deployed closer to WEC devices providing more instantaneous, location-specific measurements.<\/p>\n

In-built system flexibility is important. \u201cWe try to take our best guess by measuring wind, current, some basic ocean chemistry and waves,\u201d says Hembrough, \u201cBut we\u2019re waiting to see what our clients would find useful to be measuring out there, and then we can look at avenues to either incorporate that into existing platforms or add those platforms in the future.\u201d<\/p>\n

This testing also extends beyond buoys to an upward-facing seafloor-mounted acoustic wave and current profilers.<\/p>\n

\u201cSo that’s just another device comparison that we can use to see surface wave measurements versus sea floor wave measurements,\u201d Hembrough highlights. \u201cThere’s some benefit to seafloor assets, because they don’t have the anchor and the watch circle and all the mooring riser hardware going on.\u201d<\/p>\n

Alongside testing by Hembrough\u2019s team, another PacWave team<\/a> is using a bigger model of NexSens buoy\u2014the CB-1250<\/a>\u2013to measure the marine acoustic impact of WECs, highlighting the adaptability of these systems to different needs depending on requirements.<\/p>\n

\"The

The highly productive waters off the Oregon coast lead to significant biofouling. (Credit: Brett Hembrough)<\/span><\/p><\/div>\n

Future Possibilities of an Emerging System\u00a0<\/span><\/h3>\n

The data from the NexSens buoy is automatically displayed on the internally-accessible WQData LIVE<\/a> online dashboard. In the early stages of the project, when the team doesn\u2019t have the time or resources to package and process data, this is \u201cnice to have.\u201d<\/p>\n

Although not yet possible, the ultimate goal is for all of PacWave\u2019s baseline wave data to be freely available for anyone to support scientific research and the development of WEC technology in the region, and beyond.<\/p>\n

Better data from the buoys has additional benefits, too. Before the first PacWave data buoys were deployed, wave forecasting, analysis, and resource characterisation relied on National Oceanic and Atmospheric Organization (NOAA) buoys. However, \u201cthey’re much more distant than right there at the site, and so there’s a lot of modeling involved in that,\u201d Hembrough notes.<\/p>\n

Conclusion<\/span><\/h3>\n

While it\u2019s still too soon to know the results of the PacWave team\u2019s wave buoy comparison, the NexSens system and others are already adding value by contributing to a baseline dataset.<\/p>\n

\u201cOur goal here is to take known, good systems, put them in the ocean and make sure they’re functioning at their best,\u201d Hembrough concludes. From this starting point, it\u2019s then over to other teams to crunch the data.<\/p>\n

With this foundation\u2014part of a joint effort at PacWave\u2014the team is supporting not just the next generation of WECs, but the blue economy and its related industries.<\/p>\n","protected":false},"excerpt":{"rendered":"

The ocean could power the future. The Inter-Governmental Panel on Climate Change (IPCC) states that the potential for ocean energy easily exceeds present human energy requirements\u2013but technology to harness it is still in its nascent phase. Growing power demands are forcing rapid innovation across many sectors, including diversifying energy to come from increasingly renewable sources. […]<\/p>\n","protected":false},"author":55,"featured_media":40589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2371,2372,5,7,8,44],"tags":[91,2774,2733,2732,2492,2731,2617,2730],"class_list":["post-40586","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buoy","category-data-buoy","category-featured-articles","category-news","category-newsfeed","category-oceans-coasts","tag-buoy","tag-buoy-testing","tag-pacwave","tag-renewable-energy","tag-wave-buoy","tag-wave-energy-converters","tag-wave-monitoring","tag-wave-power"],"remote_post_permalink":false,"remote_post_featured_image":false,"yoast_head":"\nCatching Waves: Comparing Buoys to Deliver Trusted Ocean Data at PacWave<\/title>\n<meta name=\"description\" content=\"PacWave is testing wave buoy systems, comparing buoys to build accurate wave data for WEC validation.\" \/>\n<meta name=\"robots\" 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(Credit: Brett Hembrough)"},{"@type":"WebSite","@id":"https:\/\/www.fondriest.com\/news\/#website","url":"https:\/\/www.fondriest.com\/news\/","name":"Environmental Monitor","description":"Application and technology news for environmental professionals","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.fondriest.com\/news\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.fondriest.com\/news\/#\/schema\/person\/b966bab5259403392efd1a3a06a1d62a","name":"Stephanie Andrews","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ee38401f4faa2aa26b7779228463bdc933328af80c06f8120543920a07444a7a?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ee38401f4faa2aa26b7779228463bdc933328af80c06f8120543920a07444a7a?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ee38401f4faa2aa26b7779228463bdc933328af80c06f8120543920a07444a7a?s=96&d=mm&r=g","caption":"Stephanie Andrews"},"description":"Stephanie Andrews is a\u00a0Climate Scientist and Systems Specialist with NexSens Technology. 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