Abstract:Submerged buoys are important equipment for long-term underwater fixed-point marine environment observation. Glass instrument cabins, with their excellent pressure resistance, wave penetration, and corrosion resistance, are widely used in the design of submerged buoys. This article designs a general structure of a submerged buoy based on a single glass instrument cabin, analyzes the buoyancy and diving speed of the submerged buoy, introduces a simple and reliable parallel fuse release device, and proposes a reliable recovery process. The submerged buoy can also be equipped with different mooring systems to become an anchored buoy or a bottom-seated buoy to adapt to different usage purposes and marine environments, which has certain promotional value.