When a diver signals for help from a distance, and there are no watercraft available, you should enter the water:

Entering the water as close to the diver as possible is essential for several reasons. First, it minimizes the time it takes to reach the distressed diver, which is crucial in emergencies where every second counts. Additionally, approaching from a distance can increase the chances of complicating the situation, especially in unpredictable conditions such as waves or currents. By entering the water as close as possible, the rescuer can ensure a more direct and efficient path to assist the diver.

Choosing the correct point of entry reduces the swimmer's exposure to potentially hazardous conditions that might exist farther away from the distressed individual. It also helps in maintaining clearer visibility for both the rescuer and the diver.

In contrast, entering from the position where you are sighted might mean you’re too far away to reach the diver quickly. A headfirst racing dive could be reckless, especially in an emergency situation where signal indications could suggest the diver is in distress; this type of entry might not be safe or appropriate. Lastly, while using safety gear is critical for many diving situations, in this scenario, simply entering the water close to the diver takes precedence to provide immediate assistance.