What is a key factor to consider when using dive tables?

The key factor when using dive tables is that both depth and time are integral to determining safe dive limits. This is because the duration of a dive at a specified depth significantly influences nitrogen absorption in the body, ultimately affecting the risk of decompression sickness.

As a diver descends to greater depths, the pressure increases, allowing the body to absorb more nitrogen from the breathing gas. The longer a diver spends at a certain depth, the more nitrogen is absorbed. Dive tables are designed to help divers calculate how long they can stay at each depth while minimizing the risk for decompression sickness upon surfacing.

Focusing solely on depth would overlook the crucial factor of time spent underwater, which can lead to dangerous situations if appropriate limits are not followed. Thus, understanding both aspects is fundamental for safe diving practices.