How is a dive table utilized in diving practices?

A dive table is an essential tool in diving practices that provides critical information about safe dive limits. Its primary function is to determine safe dive times and depths based on nitrogen absorption by the body. When a diver descends, the pressure increases, causing the body to absorb nitrogen from the air in the tank. If a diver ascends too quickly or stays at a depth for too long, they risk decompression sickness, commonly known as "the bends," which occurs due to the formation of nitrogen bubbles in the body as pressure decreases.

The dive table lists various depths and corresponding no-decompression limits, helping divers plan their dives and make informed decisions about how long they can stay at certain depths without exceeding safe nitrogen absorption levels. By referencing the dive table, divers can effectively manage their exposure to nitrogen and reduce the risk of decompression-related injuries.

In contrast, other options do not pertain to the primary function of a dive table. Calculating the weight of diving equipment is a separate consideration typically addressed by assessing buoyancy and gear specifications, while underwater navigation requires different tools such as compasses or dive computers. Measuring water clarity is similarly unrelated to dive tables and typically involves visual assessments or specialized instruments.