What is the ultimate objective of maintaining tension in the guideline?

The ultimate objective of maintaining tension in the guideline is to prevent slack line. This is crucial in cavern diving, as slack in the guideline can lead to a loss of reference, which increases the risk of disorientation. By keeping the line taut, divers can ensure that they always have a clear path back to the entry point, which is essential for safety, especially in environments with potentially low visibility or confusing passageways.

When the guideline is taut, it helps to provide a reliable navigational tool. If the line becomes slack, it can create situations where divers may inadvertently lose contact with the guideline or misinterpret their position in relation to it. Maintaining tension helps in keeping the divers oriented and aware of their surroundings, thereby enhancing safety throughout the dive.