Night Diving and Limited Visibility (SC-LV) Practice Exam Prep – SSI Specialty Course

In low visibility conditions, divers must rely on non-verbal communication methods that allow them to convey messages effectively despite the challenging environment. Hand signals and physical contact are particularly beneficial because they facilitate clear communication without the need for auditory signals, which are ineffective underwater.

Hand signals can be easily understood in the limited light, as divers can create distinctive gestures that convey specific messages. Physical contact, such as tapping on a fellow diver's shoulder or arm, serves as an immediate way to get attention and indicate the need for communication. Together, these methods help maintain awareness among divers and ensure safety in an environment where visibility is compromised.

While bright lights can be useful for signaling, they may not always penetrate murky water effectively, and reliance solely on light can lead to miscommunication. Vocal signals, as mentioned, are not practical underwater, and bubbles, while serving as an indicator of presence, do not convey structured messages. Thus, using hand signals and physical contact is the most reliable method in low visibility situations.