El Galleon is where Asia Divers business is, a scuba training and PADI diving certification resort. I am familiar only with the shore diving site where they do the open-water scuba training. All other diving sites are a little further, varies between 20 min to an hour boat ride.
Cannot include links in the response, but search Sabang dive sites or, Puerto Galera dive sites
Get an answer from El Galleon Beach Resort & Hotel staff and past guests.