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Facing the further development of ocean detection sensor technology and the urgent situation of accelerating the expansion of my country's maritime power in the current international situation, we must conduct urgent research on the research progress and practical new development of ocean detection sensor technology. This article focuses on marine detection sensors and their development and application in the marine field. It briefly introduces the composition and system of ocean detection sensors, lists the main product types and key technologies of ocean detection sensors, introduces its main application fields according to the development of ocean detection sensors, and prospects the future development of the ocean. Detection sensor.