cost of padi certification vs cost of sdi certification
PADI Open Water Dive Course (15 years +). The Professional Association of Diving Instructors (PADI) is the worldâs largest recreational diving membership and diver training organization founded in 1966.SDI Junior Open Water Scuba Diver Course (10 â 14 years). SDI Open Water Scuba Diver Course (15 years +).Scuba Diving International (SDI) was created in 1999 and grew out of the success of their sister company TDI, which specializes in the more advanced disciplines of technical dive training.DI Open Water Scuba Diver Course (15 years +). Scuba Diving International (SDI) was created in 1999 and grew out of the success of their sister company TDI, which specializes in the more advanced disciplines of technical dive training.