True or False: Properly managing gas supply can prevent the most common cause of POIS.

Managing gas supply effectively is indeed critical in preventing the most common cause of Pulmonary Over-inflation Syndrome (POIS), which is the over-expansion of the lungs due to improper ascent or gas management during a dive. When divers do not monitor their gas supply properly or do not adhere to safe ascent rates, they increase the risk of lung over-expansion as they ascend toward the surface.

Proper gas management includes ensuring that there is enough gas to complete the dive while allowing for a safe ascent. This often means planning dives with adequate reserves for emergencies and practicing ascent protocols that include safety stops. By understanding and managing gas consumption, divers can significantly reduce the risk of POIS, thus illustrating the importance of training and preparation.

While it's true that even less experienced divers can benefit from proper gas management, it is not exclusive to experienced divers alone. Anyone trained in safe diving practices can utilize these principles to minimize risks. Therefore, the statement holds true because effective gas management is a key factor in reducing incidents of POIS.