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 properties，are widely used in the design of submerged buoys. In this article，an overall structure of a submerged buoy based on a single glass instrument cabin is designed，the buoyancy and diving speed of the submerged buoy are analyzed，a simple and reliable parallel fuse release device is introduced，and a reliable recovery process is proposed. 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，and has certain promotional value.
