Which of the following is NOT a concern regarding buddy safety?

The factor that is not primarily aligned with buddy safety is environmental conditions. While understanding environmental conditions is crucial for overall diving safety and decision-making, it does not directly pertain to the interactions and support between dive buddies.

In diving, buddy safety focuses on aspects directly affecting the partnership, such as gas management, hazards present in the dive site, and thermal considerations that relate to how well divers can assist each other. Gas management is vital because being aware of each other’s air supply can prevent emergencies. Hazards refer to any potential dangers that could affect one or both divers during the dive, emphasizing the need for buddies to watch out for one another. Thermal considerations become relevant as they impact a diver's comfort and ability to perform during a dive, thereby affecting the safety of both divers.

In contrast, while environmental conditions such as currents, visibility, and water temperature can impact the dive as a whole, they do not specifically address the direct concerns of a buddy system which emphasizes communication and support between divers.