Which of the following factors does NOT affect depth limit when diving?

The depth limit of a dive can be influenced by several factors, including environmental conditions, a diver's physical and mental state, and their previous dive experience. Environmental conditions, such as water temperature, visibility, and currents, can greatly impact a diver's ability to safely reach and return from a certain depth. The physical and mental state of a diver is crucial; fatigue, stress, or lack of focus can lead to poor decision-making and increased risk. Similarly, previous dive experience helps in assessing a diver's comfort, skill level, and familiarity with deeper dives, which directly influences the maximum depth they should attempt.

Weather conditions on the surface, however, do not have a direct impact on the depth limit while diving. While adverse weather can affect surface conditions and potentially create hazards for surface operations, once a diver is underwater, the influence of surface weather diminishes, making it less relevant to the actual depth that can be safely reached beneath the surface. Hence, weather conditions on the surface are not considered a factor affecting the depth limit when diving.