 Unmanned aerial vehicles, UAVs, are increasingly being used in search and rescue, SAR, operations due to their flexibility, mobility, and accessibility. These drones can reach inaccessible or dangerous areas, perform challenging operations, and provide real-time monitoring and modeling of the situation. This paper provides an overview of the latest developments in UAV-based SAR operations, including sensor integration, target perception, localization, and applications. Different approaches and methodologies are compared and evaluated, with particular attention paid to the strengths and weaknesses of each approach. Finally, potential avenues for improving the performance of UAVs in SAR are discussed. This article was authored by Mingyang Liu, Iba Zhao, Chaohuang, and others.