The amended Environmental Clearance Certificate (ECC) No. 2300114 is required by the Proponent (PGS Exploration (UK) Limited) for the Proposed Multiclient/Proprietary 2D / 3D Seismic Survey covering Blocks 2310, 2311B, 2311A, 2312, 2410, 2411, 2412A, 2412B, 2511, 2512B, 2512A, 2513, 2611, 2612B, 2612A, 2613, 2712B, 2712A, 2713, 2714A, 2714B, 2812B, and 2812A, and Portions of Blocks, 2210B, 2210A, 2211Bb, 2211Ba, 2212B, 2614, 2813B, 2813A, 2814B, and 2814A, Walvis, Orange, and Lüderitz Basins Offshore Namibia. PGS is proposed to conduct Multiclient/Proprietary 2D / 3D Seismic Survey covering Blocks 2310, 2311B, 2311A, 2312, 2410, 2411, 2412A, 2412B, 2511, 2512B, 2512A, 2513, 2611, 2612B, 2612A, 2613, 2712B, 2712A, 2713, 2714A, 2714B, 2812B, and 2812A, and Portions of Blocks, 2210B, 2210A, 2211Bb, 2211Ba, 2212B, 2614, 2813B, 2813A, 2814B, and 2814A, Walvis, Orange, and Lüderitz Basins, Offshore Namibia. Multiclient/Proprietary 2D / 3D Seismic Survey is a detailed local targeted mapping / imaging methodology aimed at de-risking an exploration project by establishing a validated prospect/s or lead/s scale models of an exploration Area of Interest within a Sedimentary Basin. The dense grid of a Multiclient/Proprietary 2D / 3D Seismic Survey will provide high-resolution 3D images which reveal fine-scale geological structure for exploration in more complex settings with aim of delineating prospects or leads. The basic principle of Multiclient/Proprietary 2D / 3D Seismic Survey method is the application of controlled generation of sound / acoustic waves by a seismic source to obtain an image of the subsurface. The generated acoustic wave that travels deep into the earth, is reflected by the various rock formations of the earth and returns to the surface where it is recorded and measured by receiving devices called hydrophones. The recorded wavefield contains all kinds of useful information about the structure and composition of the subsurface. Geophysicists, geologists, and petroleum engineers use sophisticated software to process the seismic data sets and create subsurface images /maps showing potential drill-ready subsurface geological structures called reservoirs that may contain potential commercial hydrocarbons resources.