12 dive sites in Olongapo, Philippines: 5 reefs, 2 wrecks, 1 muck dive and 4 other sites.
Recorded maximum depths range from 18 m to 25 m (6 of 12 sites have a depth).
By level: 3 beginner, 1 intermediate and 2 advanced.
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.