What aspect, in addition to weight placement, significantly affects trim?

Trim refers to the orientation of a diver in the water, specifically how balanced they are while swimming in a horizontal position. In addition to the placement of weight, which greatly influences trim, the amount of weight and the diver’s posture are also crucial factors.

The amount of weight a diver carries impacts buoyancy. If a diver is overweighted, they may tend to sit head-down in the water, which affects their ability to maintain horizontal trim. Conversely, being underweighted can lead to the diver being overly buoyant, which can also disrupt a balanced horizontal position.

Posture plays a vital role as well. How a diver positions their body while diving—whether they are too arched or hunched—can shift their center of gravity and impact how they move through the water. A proper posture helps in achieving better trim, as it allows the diver to align their body efficiently for streamlined movement.

Thus, both the amount of weight and posture are significant contributors to managing trim, making the choice that combines both these factors correct.