Fishing gear used in coastal fishing should be equipped with fishing buoys, indicating their locations, thus enabling their constant monitoring and detection by other ships to avoid collision. However, common fishing buoys fabricated using Styrofoam, bamboo, or PVC have short detection ranges owing to their weak radar radio wave reflection. Although research on improving the performance of radar equipment is in progress, studies on early detection of fishing gear to reduce collisions with ships sailing nearby are limited. In this study, we conducted experiments to determine methods to prevent collisions between ships and fishing gear by improving both the fishing buoy material and installation method for the reflector to increase the radar detection range of the fishing buoys.