Which of the following can help maintain contact with your buddy in low visibility?

Maintaining contact with your buddy in low visibility is essential for safety during a dive. The ability to navigate underwater becomes particularly critical in such conditions. Skill in underwater navigation allows divers to orient themselves and their dive plan, ensuring that they can stay together, especially when visual cues are minimal. A diver who is proficient in navigation can use reference points, compass bearings, or planned swim patterns to ensure they and their buddy are moving in tandem.

While other options such as using hand signals or buddy checks with light are helpful in communication, they don't necessarily assist in keeping physical proximity in environments where visibility is compromised. Furthermore, a dive flag is meant to signal other boaters of divers' presence but does not assist in maintaining buddy contact during an actual dive. Consequently, the focus on navigation skills directly addresses the challenge of low visibility, making it a fundamental competency for ensuring safety and enhancing the diving experience.