What is the recommended way to transport an injured diver to safety?

Using a tow line or buoy to assist an injured diver is recommended because it allows for support and safety while transporting them to a secure location, such as the surface or a boat. This method minimizes the risk of further injury to the diver and ensures that they remain buoyant and visible while being moved.

When you use a tow line, you can maintain control over the injured diver, and if necessary, provide additional flotation support with a buoy. This not only facilitates a more stable transport but also allows rescuers to monitor the condition of the injured diver throughout the process.

Carrying an injured diver directly to the boat can exert additional strain on both the rescuer and the victim, particularly in the water. Leaving a diver for rescue teams is not advisable as it creates unnecessary risk to the diver's safety and may lead to deteriorating conditions. Inflating a buoyancy control device (BCD) fully might be appropriate in specific scenarios; however, it doesn't address the need for coordinated transport and support effectively as a tow line does. Hence, utilizing a tow line or buoy is the most efficient and safe method for transporting an injured diver to safety.