What is a notable limitation of drones in search and rescue operations?

The notable limitation of drones in search and rescue operations is indeed related to their battery life and range. Drones typically operate on battery power, which limits their flight duration. Depending on the model and usage, most consumer and even many professional drones have flight times ranging from 20 to 40 minutes on a single charge. This limited operational time can significantly restrict their effectiveness during extended search and rescue missions, where time is critical.

Additionally, the range of a drone is the maximum distance it can fly from its operator while still maintaining a reliable connection. If a drone exceeds its range, it risks losing signal, which can hinder search and rescue efforts, especially in large or rugged terrains. This limitation makes it crucial for operators to plan their missions carefully and be aware of the battery status and connection limits, ensuring they can complete their objectives within these constraints.

In contrast, the other options present features that do not align with the common capabilities of drones: they do not operate effectively in all weather conditions, cannot carry unlimited weight, and do not fly at supersonic speeds. Each of those aspects reflects limitations or characteristics that fundamentally differ from what is realistic for drones used in such operations.