Dive transect summaries in PDF format for each of the ROV Holland (Marine Institute, Ireland) underwater video dive tracks collected during SeaRover 2018 research cruise onboard Irish Lights Vessel Granuaile between 2 July 2018 - 22 July 2018. SeaRover stands for Sensitive Ecosystem Assessment and ROV Exploration of Reef. This survey was commissioned by the National Parks and Wildlife Service (NPWS), funded by the European Maritime and Fisheries Fund (EMFF), and coordinated and led by INFOMAR (Integrated Mapping for the Sustainable Development of Ireland?s Marine Resources) and Ireland?s Marine Institute. In total, 52 underwater video dive transects have been collected during SeaRover 2018 survey. Thus, this dataset consists from 52 PDF files with each dive summary providing information about the following: Date & Time, Latitude & Longitude, Depth, Images, Samples, Location, Target Features, Depth Range. In addition, each document presents a GIS map displaying the dive track and presenting some representative highlight images; as well as Summary Description (habitat transitions noted); Physical Data; and Biological Data (including Biotope List (Marine Habitat Classification for Britain & Ireland)); Conservation Targets; and if applicable some Additional Comments. None