PARTICULARLY SENSITIVE SEA AREA (PSSA) The area shown is by IMO designated as a Particularly Sensitive Sea Area (PSSA). In order to avoid risk of pollution and damage to this exceptional, highly dynamic tidal ecosystem of global importance, mariners should exercise extreme care when navigating in the area and in the adjacent area. Prohibitions and restrictions within the area according to Statutory Order No. 867 issued by the Ministry of the Environment 21 June 2007.