The function of submarine launched drones is still being "tapped" ■ Pan Xiangyan and Li Rui's "Eagle Owl" -103 submarine launched drone concept diagram from underwater. Eagle Owl -103 Submarine Launched Unmanned Aerial Vehicle. According to the website of the French Ministry of Defense, in September of this year, the French Navy's attack type nuclear submarine, the Sufren, successfully launched a submarine launched drone developed by Diodon drone company. In the relevant video, only one buoy was seen to float to the surface after being released by a submarine. On the water surface, the buoy opens, revealing the built-in drone. Soon, the drone took off and began to carry out reconnaissance missions. It is said that the drone can land on the sea surface after completing its mission and wait for retrieval. The test launch of the Sufron attack nuclear submarine is not the first appearance of a submarine launched drone. Since the concept of submarine launched drones was proposed in the 1990s, many countries have started to develop submarine launched drones. In some countries, submarine launched drones have entered the practical application stage. The United States started early in this area. In 2003, the US military conducted a test of launching the "Cormorant" submarine launched drone using an Ohio class nuclear submarine. In order to overcome the pressure caused by underwater launch, this UAV uses titanium metal "shaping", foam plastic filling, inflatable sealing and other technologies. In 2021, the US Navy announced the procurement of hundreds of "Black Wing" -10C drones from Aerospace Environment Corporation as reconnaissance and communication relay platforms, including for submarine communication. The "Black Wing" -10C unmanned aerial vehicle, in order to meet the conditions of tube submarine launch, its pop-up wings are usually hidden inside the body, and the sensing, positioning, navigation systems, etc. are also "compressed" within it. When launched, it is thrown to the sea along with the launcher, and its attitude is adjusted on the water surface. Then, the launcher launches itself. In addition, the US military has also developed submarine launched unmanned aerial vehicle systems such as "Maritime Sentinels" and "Spring Knives". Israel has also made some progress in the development of submarine launched drones. Among them, the most representative is the "Eagle Owl" -103 submarine launched drone. The drone adopts a packaging and launch method similar to the "Black Wing" -10C drone. The difference is that after launch, it can stand by on the sea for a long time before taking off. In addition to undertaking intelligence collection tasks, it can also be used as a patrol missile in emergency situations. Germany has adopted a "simple and direct" approach to the development of submarine launched drones. One is to improve the existing handheld launch drones, and then "nest" them on the top of the submarine's lifting mast - set up sealed pressure vessels, and release them when the submarine is in a periscope state. The second is to utilize the strengths of unmanned aerial vehicles with weaknesses to play their role. The communication distance of its "Flying Fish" submarine launched drone is limited, but by storing information on the drone first, waiting for it to enter the communication distance before sending it to the submarine, the "Flying Fish" submarine launched drone can continue to stand. The current development status of submarine launched drones is characterized by broad application prospects and numerous shortcomings. Due to the fact that most of them are launched from submarine missile launch tubes and subject to objective conditions, submarine launched drones generally have a small payload and limited range. At the same time, the limited endurance and communication distance make it only able to move in close proximity to the submarine, which may cause the submarine's position to be exposed. More empowering for R&D personnel and users