Having a diver license, also known as a certification card, is a pass to underwater adventure. It’s proof that an individual has undertaken a course to learn crucial skills, knowledge development, and practical experience in diving. A scuba license allows dive centers, resorts and liveaboards to quickly identify the skill level of a diver and allows the diver to prove the courses they have accomplished. Certification cards distinguish beginners from advanced divers, and recreational divers from PADI Pros.