Human: What are the best scuba diving courses in the world? Assistant: 
The PADI Open Water Diver course is one of the most popular and widely recognized scuba diving courses. It provides a comprehensive introduction to the sport, including basic safety skills, equipment handling, and an overview of underwater navigation. Other courses include the Advanced Open Water Diver, which builds on the knowledge gained from the Open Water Diver course, and the Rescue Diver certification, which focuses on helping others in distress underwater.