This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars. such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be a cost-effective long-range early-warning sensor for ship detection and tracking in coastal waters. sea channels and passages. https://herbsdailyes.shop/product-category/diagnostic-instrument-lamps/