
PADI certifications are a great option for certified divers. PADI has several different levels of training for you to choose from. There are three components to the course: an online self study module to help you learn diving theory and confined water diving to improve your comfort with your equipment. Finally, there is open water diving to put your newly acquired knowledge into practice. PADI certifications can be a great way for beginners or experienced divers to get started.
PADI
The PADI certification chart lists different levels of certification. If you're looking to become a diving professional, PADI offers a variety of courses. From Open Water to Scuba Diver, PADI has a certification for you.

SSI
First, learn about the SSI certification chart if you wish to become a SSI teacher. It is important to know that SSI certification programs are not only for the beginner, but also for more advanced ones. SSI certification courses can be taken online or in person. During the training, you'll complete several sessions in both open and confined water. Your instructor will also be there to help you learn and organize your skills based on your performance.
NAUI
There are a number of differences between the PADI and NAUI certification charts. Most notable differences are in certification requirements and teaching methods. These differences can have a major impact on a diver’s skills. Your attitude towards diving and physical abilities will determine which certification you should pursue.
CMAS
CMAS padi certification charts differ slightly from PADI. Although they may be similar in many aspects, the certifications offered by both agencies differ. CMAS requires that you dive to 18 metres and complete 4 training dives. PADI requires five.
BSAC
After completing the BSAC open water diver program, a diver may take further courses through BSAC. The BSAC certification chart lists courses that can be taken to enable a diver to achieve the advanced level. These courses are subject to a charge, which may be between 25-55 US dollars.

Digital underwater photographer
The PADI certification chart for digital underwater photographer includes an introduction to the art of underwater photography and a range of digital camera techniques. This specialty can be completed as a single course, or in two parts. It includes topics like white-balancing and colour filters as well camera setup. Students also learn about file formats and image resolution.