What must divers ensure regarding their equipment before a dive?

Divers must prioritize the calibration and regular testing of their equipment to ensure it functions correctly under the conditions they will encounter during a dive. Reliable equipment is critical for safety since it can prevent accidents and provide essential data for buoyancy, depth, and air supply. Regular checks and calibrations help identify any issues before they become dangerous, ensuring all equipment performs optimally during the dive. This practice is a fundamental aspect of dive preparation and overall safety protocols within the diving community. Consistent maintenance and testing foster a culture of safety and readiness, allowing divers to respond effectively to any potential emergencies.