What is the protocol for dealing with a diver who has a runaway ascent?

In the event of a runaway ascent, the appropriate protocol is to deploy a surface marker buoy, signal for assistance, and prepare to assist the diver upon surfacing. This approach ensures that the diver is provided with the necessary support and safety measures upon surfacing. By deploying a surface marker buoy, you create a visible signal for other divers or boat operators to know where assistance is required, enhancing the chances of a swift and effective response.

Leaving the diver to manage on their own can lead to dangerous situations, particularly if they are in distress. A direct descent to retrieve the diver might increase the risk for both the rescuer and the diver due to potential symptoms of decompression sickness or other complications that can arise from a rapid ascent. Calling for help and remaining on the surface does not provide immediate support to the diver who may need it urgently.

Therefore, the chosen response prioritizes safety and proactive measures, ensuring that assistance is ready when the diver surfaces while also alerting others to the situation.