Thursday 05/08/2021 was the 11th data acquisition for PLP2021. Sentinel 2 multispectral data of the two large area HDPE mesh and wooden targets were acquired, along with very high resolution images from a DJI Phantom 4 pro RTK drone, with the accompanying high resolution GPS measurements. Metadata collection included wind speed and direction and turbidity using a Secchi disk. Spectrometer were performed using An Ocean Insight Flame mini spectrometer was used to perform hyperspectral measurements (200-1000 nm). The biofouling on the HDPE mesh and the wooden planks is slowly beginning to affect the buoyancy of the targets. Conditions were very calm, with very low winds and waves of not more than 0.1 m and a cloud-free sky over the deployment area, however the atmosphere was heavy with aerosol concentrations.