What factor increases positive buoyancy in a dry suit?

The factor that increases positive buoyancy in a dry suit is air trapped in the suit. When divers wear a dry suit, they create a sealed environment around their body that includes air. This trapped air serves as insulation and contributes to buoyancy. Buoyancy occurs because the air is less dense than water, allowing the diver to float or remain neutrally buoyant if the right amount of air is present.

Additionally, the air within the suit can expand as a diver ascends, further affecting buoyancy. Properly managing this air is essential for maintaining control during a dive, as too much air can lead to excessive buoyancy and difficulty in descending or adjusting depth.

The other factors do not directly influence the increase in positive buoyancy in the same manner. While excess gear weight can influence overall buoyancy, it doesn't inherently increase positive buoyancy from the suit's perspective. The type of water doesn’t change the buoyancy produced by the dry suit itself, and depth affects water pressure, which can impact buoyancy but does not add to the positive buoyancy created by air in the suit.