This is probably the most affordable and best tool for finding drowning victims when there is a last seen, even a close last seen. Used properly it can see more than side scan, even though the image is not as clear. Some tweaking could improve that. We spend so much time with side scan and divers in the water wasting time and resources. On a tripod with a long enough cable, you can find someone fast. You can also guide your divers to the target.