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When someone falls overboard, time becomes the most critical factor in survival. Ships traveling at speed require time to stop, launch rescue craft, and begin search operations. Meanwhile, wind, currents, darkness, and waves can quickly carry a person far from their original location. Even when rescue teams respond immediately, locating a single individual in open water remains extremely difficult.
Researchers are developing an autonomous drone system designed to shorten that timeline dramatically. Instead of waiting for a rescue boat to begin searching, the aircraft could launch automatically from a moving vessel immediately after a man-overboard incident is confirmed.
The drone combines multiple sensors to locate people in challenging maritime conditions. According to TechXplore, it carries conventional RGB cameras alongside infrared and thermal imaging systems, allowing it to detect both visible objects and body heat during nighttime or poor-visibility operations. Once a person is located, the drone is designed to deliver an inflatable life jacket equipped with a GPS transmitter.
The life jacket serves two purposes. First, it helps keep the person afloat and can significantly extend survival time in cold water. Second, the GPS beacon provides rescuers with a precise location, making it easier for lifeboats or coast guard teams to reach the victim quickly.
A major challenge is determining where to search. The drone uses a set of algorithms that analyze vessel data, wind conditions, ocean currents, and the amount of time that has passed since the incident occurred. By combining multiple search methodologies, the system predicts the most likely drift path while avoiding repeated coverage of the same areas.
The current prototype weighs approximately 25 kilograms, can carry an additional 20 kilograms of payload, and remains airborne for around 30 minutes. Depending on weather conditions and payload weight, it can search areas of up to one square kilometer.
Researchers have also developed a new landing method for returning to moving ships. Instead of hovering while calculating deck movement, the drone relies on real-time visual information from its cameras, reducing landing time from several minutes to only a few seconds.
From a defense and maritime security perspective, autonomous search-and-rescue drones could support naval vessels, coast guards, offshore platforms, and commercial shipping operators. The combination of rapid deployment, autonomous navigation, and aerial search capability offers a way to reach people in distress much faster than conventional rescue procedures.
Early testing has already demonstrated promising results, with the system reportedly locating more than 80 percent of search targets during trials.
