Abstract: Research on hydrodynamic wakes of submerged bodies is crucial for optimizing non-acoustic stealth and enhancing anti-submarine detection. This review covers the types, characteristics, experimental and numerical methods, and SAR technology applications in wake detection. Types and Characteristics: Hydrodynamic wake studies, dating back to the early 20th century, focus on complex fluid structures influenced by environmental factors like waves, temperature gradients, and water density stratification. Advances in CFD and experimental techniques have improved simulations and observations of these wakes. Wakes are categorized into surface waves ("V"-shaped and Bernoulli humps), turbulent wakes, and internal wave wakes, each influenced by different physical interactions. Experimental and Numerical Methods: Water tunnel experiments and numerical simulations are key research tools. Experiments provide direct observations of wake formation, while simulations offer flexible analysis of complex flow fields. Combining these methods offers comprehensive insights into wake dynamics. SAR Technology: SAR technology has revolutionized wake detection in complex maritime environments. It offers all-weather detection, passive modes, and wide-area coverage but faces limitations due to radar parameters, sea conditions, cost, and technical barriers. Future Directions: Future research should integrate numerical simulations, lab experiments, and field validation to enhance weak wake detection using deep learning, improving generalizability with limited data. This will optimize submerged body design, reduce costs, and enhance stealth performance.