How does altitude affect diving procedures?

Altitude has a significant impact on diving procedures due to the changes in atmospheric pressure that occur as altitude increases. When divers are at higher altitudes, the partial pressure of gases, such as nitrogen, decreases. This variation requires divers to consider different ascent rates to avoid complications such as decompression sickness, also known as "the bends."

Special considerations in ascent rates are essential because at altitude, the body's absorption of nitrogen is altered. Additionally, pre-dive planning becomes crucial to factor in how high altitude affects nitrogen loading in the body tissues, thus requiring adjustments to dive profiles. Due to these factors, divers need to establish a revised understanding of their limits and to calculate dive times and ascent times carefully.

This understanding ensures safety and mitigates risks associated with altitude diving, highlighting the importance of proper planning and execution in diving activities at elevated locations.