Which maintenance task should be done at least once per year on scuba equipment?

Servicing the regulator is an essential maintenance task that should be performed at least once a year on scuba equipment. The regulator is a critical component of your diving gear, as it delivers air from the tank to the diver at the appropriate pressure. Over time, components within the regulator can wear down, and seals may degrade due to exposure to dirt, moisture, and temperature changes. Regular servicing ensures that the regulator functions correctly and safely, preventing potential malfunctions that could compromise a diver's safety underwater.

While other tasks, such as replacing the tank, testing buoyancy, and repairing exposure suits are important, they do not have the same frequency or critical safety implications. Tanks may need replacement only if they are damaged or expired; buoyancy can be checked frequently but does not require annual servicing; and exposure suits might only need repair when they show visible wear or damage rather than on a specific schedule. Therefore, annual servicing of the regulator is vital for ensuring the reliability and safety of scuba diving equipment.