What should you yell to let the belayer know you are going over the edge?

To effectively communicate that you are going over the edge while using a rope system, it is crucial to use established phrases that convey your intent clearly to your belayer. The correct response involves using the phrases "Repelling" or "On Rappel." This terminology is specific and lets the belayer know that you are transitioning to a descending position on the rope, which requires their attention and readiness to manage your weight on the line.

Using the term "on rappel" is important as it indicates that you are about to descend and may need the belayer to ensure that the rope is managed correctly. This is essential for safety, as it alerts the belayer to anticipate a shift in tension on the rope and to be prepared to catch your weight if necessary. Clarity in communication is paramount in rope rescue scenarios to avoid accidents and ensure a smooth operation.

The other options do not effectively communicate your intent in this context. "All clear" typically signifies that an area is safe to proceed, not that you are descending. "On Belay" is used to confirm that a belay is established, which does not convey the action of going over the edge, and "Going down" may not provide the specificity needed in a rescue scenario. Hence, using