From SSI's standards (United States) there are Free diving instructor levels 1, 2 & 3. There is also 2 restriction levels of "Divers with disabilities". Those are the only 2 areas where there are numbered levels. I don't know if that helps you out or not. The general professional progression is Dive guide, Dive Master, Dive Control Specialist, Open Water Scuba Instructor, Specialty Instructor, Advanced Open Water Scuba Instructor, Dive Control Specialist Instructor, Master Instructor, Instrutor Trainer, Instructor Certifier & International Training Director.