A Learn To Dive course is a qualifying course that will give you certification as a recreational scuba diver. On completion you are given a licence, which is usually valid for life. The course itself teaches the fundamentals of scuba diving, including dive equipment and techniques. They usually include a few days completing pool dives and knowledge development sessions and finish with making four open water dives in the ocean.
Referral Learn To Dive programs are a way to get your open water license in two parts. Basically you can start your course at home with a school in your own area and do all the early training and theory in your own time. Once you have that part out of the way the school gives you what the industry call "referral papers", and you bring them with you. You then join a school in Australia and they complete your open water certification.
Advanced Open Water courses are the important first step in continuing your dive education. It is designed to give the newly certified or not so experienced diver added confidence and enjoyment in their diving through additional skills and training. Prerequisite for this course is a PADI Open Water Certificate, or equivalent, with another training agency.
The Rescue Diver course where the diver moves beyond recreational diving. By expanding their knowledge of the "science" aspects of diving and rescue/emergency techniques, the diver is now equipped to appreciate and understand the importance of training relevant to diver safety and incident management. 
Prerequisite for this course is a PADI Advanced Open Water Certificate, or equivalent rating, with another training agency.
Divemaster is the first level of the PADI "Professional" ratings. On successful completion of this program you will be qualified to supervise recreational diving activities, either boat or land based. It also allows you to act as an Instructional Assistant, and is the minimum rating required for employment in the diving industry.
The Instructor Development Course is a two-week program combining a mixture of training in the pool and classroom academic modules presented by yourself, the course director & fellow candidates. Becoming a dive instructor enriches your life - you are guaranteed personal satisfaction as you help other people achieve something that they thought was out of their reach and beyond their comfort zone.
