On Saturday 31/07/2021 we performed the 10th data acquisition for PLP2021. Data acquisition included Sentinel 2 multispectral data of the two large area HDPE mesh and wooden targets, along with very high resolution images from a DJI Phantom 4 pro RTK drone, with the accompanying high resolution GPS measurements and hyperspectral data acquisition using the S1000 drone. Metadata collection included wind speed and direction and turbidity using a Secchi disk. Spectrometer hyperspectral measurements were performed using an Ocean Insight Flame mini spectrometer. Conditions were very calm, with very low winds and waves not more than 0.1 m. The sky was clear with no cloud cover the deployment area, but the atmosphere was heavy with aerosol concentrations.