What effect does sediment agitation have at the entrance of a siphon for divers?

Sediment agitation at the entrance of a siphon significantly decreases visibility for divers. When sediment is disturbed, whether through movements caused by water flow or diver activity, particles can become suspended in the water. This cloudiness obstructs light penetration and makes it difficult to see. In cavern diving, where visibility is often already limited, this effect can be particularly pronounced, making navigation and identification of hazards more challenging.

In contrast, while increased currents could be a side effect of water movement through siphons, this does not directly relate to visibility. Moreover, gas consumption is affected by various factors, including depth and exertion levels, but not by the sediment disturbance itself. Therefore, it's clear that sediment agitation is linked directly to reducing visibility, which is critical for diver safety and navigation in these environments.