SDI Open Water Scuba Diver Practice Exam 2026 – Complete Test Prep

A safety stop during ascent is performed at a depth of around 15 feet, typically for a duration of three minutes. This practice is recommended because it allows divers to further off-gas nitrogen absorbed during the dive, reducing the risk of decompression sickness.

The safety stop serves as a precautionary measure, enabling divers to stabilize and safely eliminate excess nitrogen from their bodies before they reach the surface. Performing this stop at approximately 15 feet is ideal since it is deep enough to allow for effective off-gassing while still offering sufficient safety if any issues were to arise.

This depth is also standard practice within the diving community and aligns with guidelines provided by various diving organizations. It's important to note that while divers ascend from greater depths, making sure to include this safety stop helps ensure a safer diving experience by giving the body extra time to safely release nitrogen buildup.