What is the rule regarding the use of personal flotation devices (PFDs) during night dives?

The appropriate rule regarding the use of personal flotation devices (PFDs) during night dives is that they must be readily available for emergencies. This means that while divers may not be required to wear PFDs at all times, having them accessible is essential for ensuring safety. Night diving presents unique challenges, including reduced visibility and the potential for disorientation. In the case of an emergency, a PFD can provide crucial buoyancy and assistance in maintaining surface support if a diver encounters trouble.

It's important to note that divers are expected to be adequately trained and prepared for night conditions, which may reduce the necessity of wearing a PFD continuously. However, the emphasis on having them easily available underscores the proactive approach to safety, which is paramount in a night diving environment. This practice helps to ensure that divers can respond effectively to any unexpected situations that may arise.