Learn about the CMAS International Diver Training Certification System by reading the general requirements. Consider and select a dive training program using the dive training map or search box. The certificate starts at level one. Also called one star (open water diver) Download and read the relevant documentation. This is necessary to learn theoretical knowledge. After obtaining your one-star certification, you will receive the actual card that can be used internationally for diving. This is your proof that you have successfully completed your training, you are a certified diver! The training contains 21 Among the exercises - Recovery mask -Recovery organizer - Share alternate air with another diver - Taking off the equipment and returning it under the sea - Damage rise, etc 5 dives included. - 3 training dives - Two recreational dives, reaching the required depth of 20 metres