In what situation should a lifeguard attempt a rescue without a flotation device?

A lifeguard should only consider attempting a rescue without a flotation device when the situation is deemed safe and no other options are available. The priority in any rescue scenario is the safety of both the rescuer and the victim. If the conditions are unsafe, such as rough water or hazardous weather, it would be unwise to perform a rescue without the proper equipment.

While calm water conditions would make for a safer environment, it doesn't negate the necessity of using a flotation device unless absolutely required otherwise. Additionally, personal relationships with the victim should never influence rescue decisions; the rescuer's duty is to act professionally and prioritally. Practicing without flotation devices is also not a standard procedure for real-life emergencies—it serves more as training rather than a guideline for actual rescues. Hence, the correct stance is to rely on the use of flotation devices for safety and effectiveness in rescue operations whenever possible.