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Soft material such as mud returns the sound wave very slowly. This map shows where sub-bottom profile data has been collected from the seabed in Irish waters. This data was collected from 1996 to the present date.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The Sub-bottom profile lines show the route of the boat as it collected Sub-bottom profile (SBP) data. We refer to these lines as tracklines. Each line holds information on the vessel name, survey id, no. of lines in each survey, file name, sensor and url\u2019s to download the data and reports.This data shows areas that have been surveyed. There are plans to fill in the missing areas between 2020 and 2026. The deeper offshore waters were mapped as part of the Irish National Seabed Survey (INSS) between 1999 and 2005. INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource (INFOMAR) is mapping the inshore areas. 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