How often should CO2 cartridges be weighed?

CO2 cartridges should be weighed when received and before each use to ensure their proper function and safety during diving activities. By weighing the cartridges at these two key points, divers and supervisors can verify that they are within the manufacturer's specifications and have not been compromised in any way. This practice helps to avoid potential failures in equipment due to insufficient or defective CO2 supply, which is critical for buoyancy control and overall safety during dives. Regular checks at the point of receipt ensure that any potential issues can be identified before the cartridges are used, maintaining the highest levels of safety for dive operations. Additionally, weighing cartridges before each use allows for monitoring any potential losses in weight that could indicate leaks or damage.

Other options suggest less frequent checks or only focus on specific situations, which could lead to oversight and increase the risk during diving operations.