In the context of diving activities, WorkCover Queensland emphasizes the importance of supervision to ensure safety and efficiency. Persons conducting a business or undertaking (PCBUs) are responsible for ensuring an adequate number of workers are available for supervisory duties. These workers must be competent, possess the necessary health and fitness, be properly equipped, and trained both individually and as part of a team for specific dive or snorkel sites.

Supervision procedures, developed in consultation with workers, should be documented, outlining the responsibilities of each member of the dive team, including the vessel master. WorkCover Queensland emphasizes the need for induction, ongoing training, toolbox talks, and emergency drills to allocate responsibilities and ensure all parties are familiar with the procedures.

In high-risk diving work, the role of the dive supervisor is critical for safe operations. The dive supervisor continually monitors dive site conditions, minimizes developing risks, and implements and controls diving emergency procedures. Appointments of dive supervisors must be in writing, defining their scope of control, duration, and the number of divers or dive teams supervised.

For general diving work, the dive supervisor's duties may be delegated in certain circumstances, but the appointed supervisor remains overall in charge. WorkCover Queensland stresses the importance of recording duties on the dive plan and having systems in place for the dive supervisor to monitor any delegated responsibilities.

In recreational diving, an appropriate number of workers should undertake specific duties, such as the dive supervisor, rescuer, first aid and oxygen provider, and lookout. The number of workers needed should be determined based on the assessment of the dive site, considering factors like environmental conditions and the number of divers.

Resort diving must have continuous supervision, with ratios specified for a dive instructor or an instructor working with a certified assistant. These ratios may be adjusted based on factors like the diver's fitness or environmental conditions.

For entry-level certificate diving, certified divers, and recreational snorkeling, WorkCover Queensland provides maximum supervision ratios. These ratios can be reduced based on the abilities of the individuals or poor conditions. It is emphasized that certificated divers should undergo assessments before diving, considering medical fitness and skills relevant to the dive conditions.

In recreational technical diving, the same supervisory requirements apply, and specific attention is given to enriched air nitrox (EANx) diving and decompression diving. WorkCover Queensland emphasizes the importance of following dive training agency supervision standards for all recreational technical diving.

For recreational snorkeling, general supervisory requirements apply, and WorkCover Queensland provides guidance on the use of snorkelling guides for guided tours, considering the risks and the number of participants. The "Snorkel Safety – A Guide for Workers" is recommended for understanding roles and responsibilities in snorkelling activities.