What is the primary benefit of using a lift bag during an ascent?

Using a lift bag during an ascent primarily supports safety by managing ascent rate. When divers ascend, it's crucial to do so at a controlled rate to avoid decompression sickness. A lift bag can help maintain a steady upward movement when used properly, aiding in buoyancy control and providing assistance to mitigate rapid ascents that could lead to complications.

This method of ascent control is especially important in situations where divers are carrying additional weight or recovering objects. By attaching a lift bag to a heavy item, the diver can manage buoyancy effectively and ascend more safely, ensuring that the ascent is gradual and within the recommended limits. This helps prevent the formation of nitrogen bubbles within the tissues, which can occur from rapid changes in pressure.

While the lift bag does enhance buoyancy control and contributes to object recovery, its primary role in this context is to manage the ascent rate, making it a critical safety tool for divers during their ascent.