PADI Advanced Open Water Practice Exam

The appropriate positioning of the alternate air source is crucial for safety and accessibility during a dive. Placing the alternate air source at the mouth and lower rib cage corners allows for quick and efficient access in an emergency situation. This location ensures that the diver can easily reach the alternate air source when needed, thereby enabling a seamless transfer of airflow during situations where the primary air source becomes compromised.

When the alternate air source is positioned at the mouth, it allows the diver to breathe directly from it without significant movement, which is essential in maintaining buoyancy and minimizing the risk of panic. Positioning it near the lower rib cage provides a natural and ergonomic way to manage the alternate air source while still being easy to locate and operate.

Other positions, such as the waist and upper chest or shoulder and back, may create additional difficulties in accessing the alternate air source swiftly. These locations can lead to entanglement or restrict movement, making it harder for a diver to reach the alternate air source in urgent situations. Therefore, ensuring the alternate air source is easily accessible at the designated positions enhances safety and preparedness during the dive.