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The ADAS Part 1 Restricted course is designed for occupational divers conducting observational or non-intrusive work underwater. It suits marine scientists, ecologists, and underwater photographers who do not require the use of tools. Training includes safety procedures, dive planning, and field-based assessments — all delivered in real ocean environments to ensure divers are confident and capable. This certification meets the needs of many government, research, and educational organisations while offering flexibility and practicality in its delivery.