Area-based management tools are an important means of protecting the ocean. In addition to marine protected areas, they include spatial regulations for activities such as fishing, shipping or deep sea mining, and more comprehensive approaches such as maritime spatial planning. These measures can contribute significantly to the achievement of the UN Sustainable Development Goals (SDGs) in the ocean. However, this requires better coordination of measures and effective implementation, as researchers have shown in a new study with the participation of the IASS.