What is the first step when encountering a broken or missing guideline?

When encountering a broken or missing guideline during a dive, the most critical first step is to confirm that the correct exit line has been chosen. This is essential because the guideline serves as a navigational aid and, if compromised, finding the appropriate route back to safety becomes paramount. If a diver mistakenly attempts to follow an incorrect exit line, it can lead to confusion and potential disorientation, significantly increasing the risks involved in a cavern dive.

By verifying the exit line, divers are taking a proactive approach to ensure they are aligned with the intended route, which is crucial in an environment where visibility may be compromised, and the potential for getting lost exists. Understanding this step also highlights the importance of situational awareness and the need for clear communication with the dive team about one's status and observations regarding the guideline. Making sure that the exit strategy is sound before proceeding further into the cavern enhances safety and fosters team cohesion in challenging conditions.