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    Scottish underwater TV surveys to estimate Nephrops burrow distribution and abundance, from Nephrops Functional Units of significance to Scotland. Underwater TV footage is taken at specified stations within Functional Units. The underwater camera is mounted on a towed sledge and tow duration is 10 minutes. Records of Nephrops burrows, Nephrops and other benthic fauna is recorded onto DVD for analysis and review.

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    Indicative polygons showing the statutory limits of harbour authorities around Scotland, including competent harbour authorities with responsibilities under the Pilotage Act 1987. The dataset generally uses S57 attributes for fieldnames, see http://www.s-57.com/ for more details. The dataset is derived from a number of sources (listed in attributes) and likely to be incomplete. The boundary polygons are intended for illustrative purposes and are not legally definitive.

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    Locations of licensed dredge spoil deposit sites in Scotland, indicated by polygons The spoil is usually as a result of navigational dredging (deepening of navigation channels) on the approaches to ports and harbours. These sites are designated as open (in use), disused (not used for at least 5 years) or closed (not used for at least 10 years or specifically closed).