Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. This plume was created by a dredge on 11 April 2019 between 6:30 to 19:00 UTC. Monitoring of the baseline conditions, active plume and post-disturbance effects was achieved by a sensor array of optical and acoustical sensors on platforms spread out around the plume creation site. This dataset contains calibrated optical sensor measurements of this plume array acquired by 3 different sensors.

Deployed during ROV event SO268-2_ST111-ROV16: OBS (RBINS_ENV-04) mounted on platform RBINS_PFM-01_ENV-01. OBS (RBINS_ENV-06) mounted on platform RBINS_PFM-02_ENV-02. OBS (RBINS_ENV-08) mounted on platform RBINS_PFM-03_ENV-03.converted, sensor at 0.75 mab