How is this defined? Is it shown on a map?
United Kingdom Maritime Search and Rescue Region
HM Coastguard responds to Search and Rescue (SAR) incidents that occur within the UK SAR region. This region covers some 1.25 million square nautical miles of sea and over 10.5 thousand nautical miles of coastline. The eastern boundary of the UK SAR region joins those of Norway, Denmark, Germany, the Netherlands and Belgium in the North Sea, France in the English Channel. To the west the UK SAR region extends into the North Atlantic to meet those of Canada, Portugal, the Irish Republic and Iceland.
