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Shown here is the OOI RSN Primary Node installation vessel, the TE SubCom Dependable, passing by Astoria, Oregon. Smaller vessel alongside is the pilot boat, Connor Foss, which transferred the Columbia River Pilot to and from the ship. --Photo by Scott McMullen, OFCC

Shown here are the three OOI Cabled Array Primary Nodes that were installed during Phase II of the node installation work. Nodes 3A and 3B were loaded onto the TE SubCom Dependable during the port call in Portland, Oregon. PN5A was already onboard. All nodes are positioned on the aft deck and were successfully tested. Because these three nodes were deployed in deep water and are not a hazard to fishing activities, they do not have trawl-resistant frames. The nodes are connected to 900 km of fiber optic cables on the seafloor and have been operational since 2014. Credit: B. Ittig. University of Washington.  

This photo taken from the bridge of the TE SubCom Dependable, shows the deployment of OOI RSN Primary Node 1D in the early hours of 1 August 2012. --Photo by Paul Hagstrom, Consortium for Ocean Leadership

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OOI Primary Node 1D nearly ready for deployment in the wee hours of 1 August 2012 from the deck of the TE SubCom Dependable. --Photo by Cecile Durand

Two humpbacks visited during the node installation cruise. Credit: Cecile Durand, University of Washington, 2012.

Humpback whales have been observed playing around the TE SubCom Dependable. Two Protected Species Visual Observers are onboard as part of the OOI team during the Primary Node Installation Cruise. Credit: Cecile Durand, University of Washington, 2012.

Two humpback whales paid a visit to the TE SubCom Dependable during the first leg of the Primary Node Installation cruise. Here one of the two visitors surfaces and exhales. Credit: Patti Haase, 2012.

Final splices on cable segments 3 and 4 going overboard prior to deployment of PN1C. --Photo by Cecile Durand

Cables are spliced together after cuts are made to adjust cable length prior to node deployments. The black cones (with yellow tape) seen in this photo protect the splice box. --Photo by Cecile Durand

At dusk on July 27, 2012, OOI RSN Primary Node 1C was deployed from the TE SubCom Dependable. --Photo by Cecile Durand

OOI RSN Primary Node 1C, shown here on the deck of the TE SubCom Dependable, nearly ready for deployment. Cable segments 3 and 4 are being paid out on either side of the Node. --Photo by Cecile Durand

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Shown here is one of the ROV Nereus 3 arms going after a shackle during release operations. This action set the deployment bridle free and allowed recovery of the bridle. --Photo by Cecile Durand

Image shows how Primary Node 1B appears on the sonar of the ROV. The node is bright yellow with shadow stretching toward the top of the image. --Photo by Cecile Durand

Image shows screen monitors on the bridge of the TE SubCom Dependable for both sonar and video displays from the ROV Nereus 3. Note PN1B sitting nicely on the seabed in video display. --Photo by Cecile Durand

OOI RSN Shore Station in Pacific City, Oregon. Red dot at southern end of red line indicates where cables were pulled ashore in July 2011. Red line indicates underground route of cables from beach manhole north through conduits to the shore station.

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Shown here is the screen of an Optical Spectrum Analyzer (OSA) at the OOI RSN Shore Station in Pacific City, Oregon. The twelve peaks shown are actually the twelve wavelengths coming from the three RSN Primary Nodes currently connected--PN1A, PN1B, and PN1C. Each Node has two traffic wavelengths of 10gb/s each and two wavelengths for system management. --Photo by Pete Barletto

Screenshot from video taken by ROV Nereus 3 of OOI RSN Primary Node 1B (PN1B) in place on the seafloor. --Photo courtesy of L-3 MariPro

Remotely Operated Vehicle (ROV) Nereus 3 is readied for deployment from the TE SubCom Dependable. --Photo by Cecile Durand

On the fantail of the Dependable, Primary Node 1B (PN1B) is readied for nighttime deployment. Photo by Cecile Durand

This closeup shows part of the grapnel, nicknamed "The Beast" by Cecile Durand, used to hook and recover the cable from the seafloor. --Photo by Cecile Durang

Red "hook" at end of grapnel is shown here bringing the end of cable segment 3 onboard deck of TE SubCom Dependable. --Photo by Cecile Durand

The grapnel (red "chain" of hooks), which is used to grapple and recover the ends of cable segments, is shown here lying on the fantail of the TE SubCom Dependable, with one of the deep-water Primary Nodes to the right. Photo by Cecile Durand