What should a diver do if they cannot contact their lost buddy?

When a diver is unable to reestablish contact with their buddy, the best course of action is to ascend slowly and safely. This approach is crucial for several reasons.

First, ascending slowly allows the diver to avoid decompression sickness, which can occur if a diver ascends too quickly. During the ascent, the diver can carefully monitor their surroundings for their buddy, while also ensuring their own safety by adhering to safe ascent rates.

Second, slow ascents provide an opportunity to assess the situation and remain calm. It allows the diver to think clearly and utilize their training to communicate with their buddy, should they be within earshot or within visual distance.

Lastly, maintaining safety protocols such as ascending slowly and safely aligns with dive planning principles that emphasize conservatism and risk management. If the conditions allow, the diver can later surface and signal for their buddy from a safe vantage point, ensuring both divers can reunite effectively.