The STARS dive table is designed based on an assumed ascent rate of 10 meters per minute. When using the dive table, it is important to maintain an ascent rate as close as possible to this value. Ascending significantly faster or slower than this rate may affect the safe release of absorbed nitrogen from the body.

However, most recreational dives take place in environments where depth gradually changes. Divers typically ascend slowly while following the natural contours of the reef or seabed, enjoying the underwater scenery. In such situations, maintaining a constant ascent rate of exactly 10 meters per minute is not always practical.

Furthermore, as shown in the example dive profiles, traditional dive tables are based on square-profile dives conducted at a fixed depth.

In actual leisure diving, where divers often move between different depths, there can be a significant difference between the estimated nitrogen loading shown in the dive table and the diver’s actual nitrogen absorption.

This difference becomes even more noticeable during repetitive dives. The dive table applies conservative calculations, which increase safety but may limit allowable bottom time or restrict the ability to perform additional dives.

As demonstrated in the previous example, the gap created by dive table calculations generally works in favor of diver safety. However, in some cases, it may prevent divers from fully enjoying multiple dives in beautiful conditions.