Albena Diving Center: Offer NAUI, IDA and CMAS diving courses and diving trips. Based in Albena (Black Sea coast).Black Sea Diving School: Offer NAUI and CMAS training courses and visit to dive sites including wrecks. Based near Tzarevo (Black Sea coast).Black Sea Wreck Diving Center: A diving center in Rusalka resort offers wreck diving, cave diving and diving courses.Deep Blue Bulgaria: Lists information on instruction, local dive excursions, programs for children, photo gallery and contacts.MoniSub: Diving centre offering CMAS training courses and diving trips. Based in Sozopol (Black Sea coast).