Some of this information is not accurate and requires clarification:
1. Open Water Certification - 5 dives minimum
-O/W certification requires 4 dives. Minimum Instructor qualification to teach: OWSI.
2. Advanced Open Water Certification - again, 5 dives
-Prerequisite is Open Water diver or equivalent from another certification agency. Minimum Instructor qualification to teach: OWSI.
3. Medic First Aid - Expelled Air Resuscitation & CPR
-CPR, Resuscitation and First Aid that is not diving specific/related. This course can be taken by anyone (diver or non-diver). It is a required course for Rescue Diver and above. Minimum Instructor qualification to teach: MFA Instructor (Asistant Instructor or above.)
4. Rescue Diver - Intensive 2/3 day course.
-Prerequisite is Advanced Open Water or equivalent from another agency. Multi-day course (5 sessions)with multiple dives/dive scenarios. Current CPR & First Aid certification also required. Minimum Instructor qualifications to teach: OWSI.
5. Divemaster (first pro level) - minimum start 20 dives, 60 dives minimum by the end.
-Prerequisite is Rescue Diver or equivalent from another agency. Extensive watermanship, knowledge development, open and confined water training required to complete the course. Current CPR & First Aid certification also required. Must have minimum 60 logged dives by end of program for certification. This course can take anywhere from weeks to months to years to complete, depending on the candidate. Minimum Instructor qualifications to teach: OWSI
6. Assistant Instructor - minimum 60 dives entry
-Prerequisite is Divemaster or equivalent from another agency. Must complete 1st 3 days of an Instructor Development Course (IDC) and pass this course. Extensive watermanship, knowledge development, confined and open water training. Again, how long it takes to complete this course depends on the individual. Must teach under the supervision of an Instructor, except for MFA, which an AI can teach unsupervised. Current CPR and First aid certification required. Minimum Instructor qualifications to teach: IDC Staff Instructor.
7. Instructor - minimum 100 dives entry
-Prerequisite is Divemaster or AI or equivalent from another agency. Current CPR and First required.To become an Open Water Instructor (OWSI)must complete a full 7 day IDC through a 5* PADI IDC facility if a DM; or 4 days of IDC if an AI. Extensive watermanship, knowledge development, confined and open water training. Must have 100 logged dives prior to Instructor Examination (IE). Must pass IDC before attending IE (IE is 2 day test administered by PADI Internation via an Instructor Examiner). Minimum Instructor qualifications to teach: IDC Staff (under the supervision of a Course Director) can teach portions of this course and assist in the evaluation process of IDC Candidates. However, the only one empowered to certify IDC candidates as having completed this course is a Course Director.
There are also multiple levels of Instructor, the first level of which is the OWSI. (As it happens I am an IDC Staff Instructor.
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If you have any questions, please feel free to email me.
~SubMariner~