First part of dataset gives an overview of seabirds observed between 25 June and 31 July 1974 along Greenland, Iceland, Faeroes and the North East of Scotland. The second part gives the birding times for all stations where ornithological observations were made. Additionally air and water temperature measurements were noted for some stations. The data were digitized by VLIZ from the original report: Joiris, C. (1976). Seabirds seen during a return voyage from Belgium to Greenland in July.