Shipping Forecast August 2017 was the 150th anniversary of the shipping forecast. The 31 sea areas covering the waters around the British Isles are as defined by the map shown here: The areas were already roughly as listed above by 1949. In 1955, meteorologists from countries with North Sea coastlines met and recommended that the UK's sea area 'Heligoland' be renamed 'German Bight' to reflect more general usage amongst the nations concerned. They also recommended the divisions of 'Dogger' (with the north-eastern portion to be named 'Fisher') and 'Forties' (with the northern half becoming 'Viking'), and the renaming of 'Iceland' as 'South-east
British Isles being the highest point on the islands at . Other mountainous areas include Wales and parts of Ireland, although only seven peaks in these areas reach above . Lakes on the islands are generally not large, although Lough Neagh in Northern Ireland is an exception, covering . The largest freshwater body in Great Britain (by area) is Loch Lomond at , and Loch Ness, by volume whilst Loch Morar is the deepest freshwater body in the British Isles, with a maximum depth of . There are a number of major rivers within the British Isles. The longest is the Shannon