What should you do if a guideline must be crossed?

When crossing a guideline in a cavern diving scenario, the safest and most recommended practice is to pass under the existing guideline. This method ensures that the existing guideline remains intact and accessible for navigation. By passing underneath, you avoid creating any potential confusion or entanglement that could arise from crossing over it, which can obscure the original path and may lead to disorientation in a low-visibility environment.

Crossing guidelines can create serious safety issues, particularly in caves or caverns where visibility is limited and navigation is already challenging. Maintaining the integrity of guidelines is crucial for ensuring that divers can find their way back to the exit or to safety. Therefore, passing under reinforces the importance of clearly following established paths while minimizing risks associated with guideline management.