How is buoyancy managed during a diver's ascent?

Buoyancy management during a diver's ascent primarily involves the use of a Buoyancy Control Device (BCD) and proper breathing techniques, such as exhaling. The BCD is an essential piece of equipment that allows divers to adjust their buoyancy by adding or releasing air. When ascending, a diver can cautiously inflate the BCD to counteract the natural buoyancy they experience due to increasing pressure at shallower depths.

Additionally, exhaling while ascending helps to decrease buoyancy since the volume of air in the lungs decreases as pressure reduces. This careful combination of managing the BCD and controlling breath holds allows for a safer, more controlled ascent, preventing rapid experiences of buoyancy changes that could lead to issues like decompression sickness.

While increasing weight or controlling fins might seem relevant, they do not effectively address buoyancy management. The continuous adjustment of diving depth can help maintain control; however, it's the effective use of the BCD and exhaling that are vital components for safe ascent management.