27 dive sites in Ulster, Ireland: 3 reefs, 3 wrecks, 1 cave, 1 drift dive and 19 other sites.
Recorded maximum depths range from 10 m to 73 m (19 of 27 sites have a depth).
By level: 3 beginner, 2 intermediate, 2 advanced and 3 technical.
Species confirmed at sites here by diver sightings (three or more independent divers) or by two or more independent sources, with the number of sites each is confirmed at.