This dataset represents a shapefile showing location of underwater video transects collected onboard RV Celtic Explorer with ROV Holland during CE0915 research cruise between 1-21 September 2009. The attribute table of this shapefile contains links to video footage for each of the transects. In total, 4 video transects have been recorded: 2 in Whittard Canyon and 2 on the Northwest Porcupine Bank. Link to cruise report (Guinan, J. and Leahy, Y. (2010) Habitat Mapping of Geogenic Reef Offshore Ireland. Report prepared by the Marine Institute, Galway, Ireland and Geological Survey of Ireland to the Department of the Environment, Heritage and Local Government s National Parks and Wildlife Service.): http://data.marine.ie/data/IrelandsSeabedCatalogue/CE2009/NPWS Offshore SAC Project March 2010.pdf None