Objective: Develop the knowledge and practical understanding required to explain decompression principles and how inert gas behaves during and after a dive.
Knowledge: Explain basic decompression principles including tissue groups and half-times, saturation, in-gassing and out-gassing, residual nitrogen, and the limitations of decompression models.
Skills: Demonstrate decompression understanding by applying principles to dive examples and identifying how tissue loading influences decompression risk and planning decisions.

Objective: Develop the knowledge and practical skills required to describe and apply decompression procedures used in SCUBA and surface supply diving operations.
Knowledge: Explain types of decompression procedures, decompression rules, contingency planning, toolbox talk requirements, and decompression equipment used during operations.
Skills: Demonstrate operational readiness by applying correct decompression procedures and contingency decisions to dive planning and scenario-based emergency situations.

Objective: Develop the knowledge and practical skills required to recognise and manage factors that increase the risk of decompression illness.
Knowledge: Explain environmental, operational, and personal risk factors that contribute to DCI and how these factors increase decompression stress and risk exposure.
Skills: Demonstrate risk control decision-making by identifying predisposing factors in scenarios and applying preventative strategies to reduce decompression illness risk.

Objective: Develop the knowledge and practical skills required to interpret decompression tables accurately and understand their limitations for different dive profiles and conditions.
Knowledge: Explain how decompression tables are structured, how no-decompression limits work, how repetitive dive rules apply, and how profile limitations affect table reliability.
Skills: Demonstrate table competence by selecting correct table entries for dives, interpreting repetitive dives, and identifying when table limits require modified planning or additional safety margins.

Objective: Develop the knowledge and practical skills required to interpret dive profiles and apply profile planning principles to decompression decision-making.
Knowledge: Explain what dive profiles are, different profile types, how profiles influence decompression requirements, and why certain profiles increase decompression risk and table limitations.
Skills: Demonstrate dive planning competence by identifying profile types and applying appropriate planning decisions and limitations to scenario-based dive examples.

Objective: Develop the knowledge and practical skills required to understand altitude diving and apply corrections for safe decompression planning at higher elevations.
Knowledge: Explain altitude diving principles, how reduced atmospheric pressure affects decompression, required correction calculations, and how altitude influences equipment and operational planning.
Skills: Demonstrate competence by applying altitude correction procedures, adjusting dive plans accordingly, and identifying risks associated with altitude-related decompression errors.

Objective: Develop the knowledge and practical skills required to monitor divers and record dive information to support decompression safety and operational control.
Knowledge: Explain diver and self-monitoring requirements, buddy monitoring, post-dive observation, operational dive logging, and the role of decompression computers in recording profiles and exposure.
Skills: Demonstrate monitoring competence by applying correct monitoring procedures, recording accurate dive log data, and using computer information to support safe post-dive decisions.

Objective: Develop the knowledge and practical skills required to respond correctly to omitted decompression incidents and apply emergency oxygen procedures during decompression-related emergencies.
Knowledge: Explain omitted decompression causes, risks, and response procedures, and explain why 100% oxygen is used for suspected decompression illness and how it supports casualty management and escalation.
Skills: Demonstrate emergency response competence by selecting correct omitted decompression actions, applying monitoring and escalation steps, and integrating emergency oxygen procedures into scenario-based emergencies.

Objective: Develop the knowledge and practical skills required to apply safe flying-after-diving guidelines to reduce decompression illness risk after diving exposure.
Knowledge: Explain post-dive flying risks, why altitude exposure increases DCI risk, and the guidelines and time considerations for safe flying after diving.
Skills: Demonstrate safe decision-making by applying correct flying-after-diving rules to dive scenarios and selecting appropriate post-dive time and safety recommendations.

Objective: Develop the knowledge and practical skills required to understand and describe different modes of decompression used in commercial diving and treatment environments.
Knowledge: Explain decompression modes including no-decompression diving, in-water stage decompression, surface decompression, saturation diving, and recompression/hyperbaric treatment, and when each is applied operationally.
Skills: Demonstrate applied understanding by identifying appropriate decompression modes for operational scenarios and explaining why specific modes are used based on depth, exposure, and operational requirements.