This article is a continuation of the authoress' research in the subject of special areas on the seas and oceans. A marine area of particular sensitivity is an area that requires protection from shipping that is dangerous to the marine environment and its resources. Eleven marine areas of particular sensitivity have been established. Such an area may be set out 'within and outside the borders of territorial waters, including the open sea'. The IMO has indicated general ways of protecting a marine area of particular sensitivity. These include: new plans to limit sea traffic and recommended sea paths. The purpose of these is to minimize the risk of maritime accidents and oil spillages. Protection also entails the possibility of making it compulsory to use a pilot in such areas. In 1990 the IMO designated the Great Barrier Reef an area of particular sensitivity. It was made compulsory to employ the services of an Australian pilot when passing through the Torres Strait. In addition, a compulsory system of reporting on the port of vessels and two-way ship paths were introduced. The authoress discusses a Western European and a Baltic marine area of particular sensitivity.