Spatial extent and confidence rating of activities.

Estimates of the spatial extent of six major human activities occurring directly on the sea floor, including structures and artefacts present on the seafloor resulting from past activities, within the OSPAR maritime area of the North East Atlantic in waters >200 m during 2005. Estimates for bottom trawling and marine scientific research are based on 2005 data only.wd: water depth;†Confidence ratings indicate whether the spatial extent of each activity is based on data or estimates of location and extent (Eastwood et al., 2007) [19]: 1, estimated location and estimated extent; 2 known location, estimated extent; 3, known location and extent.*Carter et al., 2009 [23].1Information from NPD and Statoil datasets and Eastwood et al., 2007 [19].2Overlapping boundaries merged.3SERPENT Project, unpublished data.