This extensive local seascape character assessment covered the varied coastline between Laugharne and Porthcawl including the Gower AONB and Swansea, and territorial waters upto 12 nautical miles offshore. The aim of the project was to develop a detailed seascape study which could be used as a baseline character assessment informing marine planning within the context of the Welsh National Marine Plan.For this project, our multidisciplinary team built on current generic UK guidance and learnt lessons from our pilot seascape assessment around the Pembrokeshire coast. Cutting through the plethora of marine datasets available, the team used our simple but rigorous method to defining marine seascape types using three defining physical characteristics. These form the basis for defining seascape character areas which are described in detail in terms of physical and cultural influences, and perceptual qualities. Importantly, the study then identifies forces for change and key sensitivities.The study was guided by a large steering group of stakeholders with diverse needs who all contributed to the study. In addition, the study was widely consulted on in a series of stakeholder group meetings and via a web consultation in English and Welsh. This collaborative process presented challenges but resulted in a study benefitting from a large amount of detail and local knowledge.The study is intended to be adopted as supplementary planning guidance by most of the four client local authorities and used for assessing marine and coastal development.