SDI Open Water Scuba Diver Practice Exam

In the context of scuba diving, buoyancy refers to the ability of an object to float or sink in water, and it is classified into three main states: neutral, positive, and negative buoyancy.

Neutral buoyancy occurs when the weight of the diver and their equipment equals the weight of the water they displace, allowing them to hover effortlessly at a specific depth. Positive buoyancy means the diver or object is lighter than the water and will float to the surface. Negative buoyancy indicates that the diver or object is heavier than the water, resulting in sinking.

The term "passive" buoyancy does not represent a recognized state of buoyancy in diving terminology. Therefore, this choice stands out because it does not accurately describe a specific condition related to how divers interact with water. Understanding the three recognized states helps divers manage their ascent, descent, and overall stability while underwater, and differentiating them from non-standard terms like "passive" is essential for clarity in diving education.