IANTD Rescue Practice Test 2026 - Free Rescue Diver Practice Questions and Study Guide

Safety stops should be implemented at every ascent regardless of conditions to help mitigate the risk of decompression sickness. This practice allows for nitrogen that may have accumulated in the tissues during the dive to be released gradually and safely as the diver ascends. Typically, a safety stop of 3 to 5 minutes at a depth of around 15 to 20 feet is recommended, especially after dives deeper than 30 feet or dives longer than 20 minutes.

The rationale behind this practice is based on the physiological response of the body to pressure changes when ascending. Even if a dive is shallow or if conditions seem favorable, the cumulative effects of previous dives or potential variations in the diver's body may necessitate a safety stop to ensure a safe ascent. This precautionary measure contributes significantly to a diver's overall safety and is a standard operating procedure in recreational diving. Adopting this practice helps ensure that divers can ascend without risking bubbles forming in their tissues, which could lead to serious health risks.