More than two-thirds of the earth ’s area is covered by the ocean. This is a mysterious world, and obtaining the Open Water Diver Certificate will be your first step in exploring the marine world. As long as you are 10 years old, in good health, and have basic physical fitness, after three days of systematic study, you can obtain a globally certified and valid PADI Open Water Diver Certificate for life. Diving, this will change the way you see the world. The diving instructors diligently teach diving skills in a responsible manner, and have developed good habits for everyone from the beginning, laying a solid foundation for future diving.