What is a potential effect of previous dives on deep-diving limits?

Altered decompression limits can occur due to the cumulative effects of previous dives. When a diver ascends after a dive, nitrogen is absorbed into the body's tissues under increased pressure and is released as the pressure decreases during ascent. If a diver has recently completed other dives, the residual nitrogen in their system can impact how quickly they can ascend and how deep they can safely dive thereafter.

The concept of no-decompression limits and the need for safety stops are based on the understanding of how nitrogen behaves in the body. Previous dives can necessitate adjustments to a diver's plan to prevent decompression sickness, which can be significantly influenced by factors like dive profiles and depths. Therefore, understanding these altered limits is crucial for planning subsequent dives to ensure safety and minimize risk.

In contrast, previous dives may not directly lead to increased buoyancy, adjusted visibility, or variable equipment performance, making those choices less relevant in this context. It’s essential for divers to be aware of their previous dive history for proper planning and risk management.