Buoyage for emergency communication and corresponding rescue method

A buoyage for emergency communication comprising:

• a positioning device (2), a buoyancy block (3), a plurality of compression springs (4), an optical fiber (5), a reel (6), a frame (7), an optical fiber slip ring (8), a pure iron disk (9), an optical fiber connector (10) and an oil-filled electromagnet (11), wherein the positioning device (2) is fixed on a top portion of the buoyancy block (3), and is configured to emit a position signal of itself when the buoyage returns to a surface of water;
• the buoyancy block (3) is provided above the frame (7), wherein the compression springs (4) are provided between the buoyancy block (3) and the frame (7);
• the pure iron disk (9) is fixedly connected on a bottom portion of the buoyancy block (3);
• the oil-filled electromagnet (11) is fixed on the frame (7) and below the buoyancy block (3), the oil-filled electromagnet (11) adsorbed to the pure iron disk (9) after being energized to limit a vertical displacement of the buoyancy block (3);
• a limiting rod is provided on an upper portion of the frame (7) for limiting a horizontal displacement of the buoyancy block (3);
• the optical fiber (5) is wound on the reel (6) and below the frame (7) for transmitting data and controlling instruction;
• a first end of the optical fiber (5) is connected with the optical fiber connector (10) and detachably fixed on a bottom of the buoyancy block (3), and can be removed if necessary;
• a second end of the optical fiber (5) passes through a central hallow of the reel (6) to connect the optical fiber slip ring (8).