Page "Professional Association of Diving Instructors" Paragraph 3

PADI courses are performance based dive programs, and at the introductory level emphasize practical knowledge, safety and motor skills.

The foundations of diving physics, physiology and chemistry are built during entry level programs.

The more esoteric details of these concepts are left for later courses when the diver has gained practical knowledge and experience beyond the entry level.

These practices fall within current modern learning philosophies and receive regular updates via peer review.