What marking identifies most jumps in cavern diving?

In cavern diving, the identification of jumps is crucial for navigation and safety. The standard marking for most jumps is two permanent arrows pointing in the same direction. This marking system ensures that divers can easily recognize the path they need to follow when navigating through the complex underwater cave systems. The use of two arrows provides a clear visual indicator that is less likely to be confused with other markings, helping divers maintain orientation during their dives.

While other options may be relevant in different contexts or practices, they do not serve the specific purpose of marking jumps in cavern diving as effectively as the dual arrow system. For instance, a single flag marker on the surface might indicate a dive site or assist in surface navigation, but it does not provide the necessary underwater directional guidance. Likewise, a colored buoy floating on the surface can be helpful for surface navigation but lacks the utility needed for jump identification within the cavern itself. Lastly, a rope tied in a specific pattern could serve various purposes in diving, including marking boundaries or hazards, but it does not represent the standardized marking for jumps that divers are trained to recognize.