On 12 August 2007, NEPTUNE Canada conducted a test of the ROCLS (ROPOS Cable Laying System). This unique system utilizes the ROPOS ROV with a specially designed cable laying spool and operating system. During the initial stage of the test, the main (backbone) cable of the project will be placed using a cable laying ship and specialized cable laying sled. ROCLS allows for the deployment of smaller diameter cables that cannot be laid by a cable ship. The ROV will have the added flexibility of laying small cable with the opportunity to change the cable route around obstacles. In addition, the ROV will connect nodes to the instrument arrays. This is also a cost effective method of laying the cable along the spur alignment. Testing ROCLS consisted of three dives: Dive 1 - A test of the cable laying hydraulics package; Dive 2 - A function test of the cable spool attached to the ROV/sled system; and Dive 3 -s Practice laying one kilometer of cable on the seabed at a 1500 m depth to observe how it was supported by the sediment, followed by the ROV retrieval of the cable.

Figure 1. Pictured is the ROCLS (ROPOS Cable Laying System). As shown in the figure the ROPOS ROV is directly below the deployment/retrieval crane. The cable spool and hydraulics system package is directly below the ROV.

Figure 2. Loading the one kilometer length of test cable onto the ROCLS deployment/Retreival spool.


Ocean 411

School OF Oceanography University of Washington

Where We Went

Information about places we are going

placeholderNEPTUNE Canada
Canadian NEPTUNE cabled observatory


placeholderODP 889
ODP 889 Survey area



placeholderBarkely Canyon
Barkely Canyon Node Survey area



placeholderEndeavour Segment
Information about the Endeavor Segment