System for securing a submerged buoy

A system for securing a submerged buoy, comprising:

• equipping the submerged buoy to ensure the rise thereof to a surface on command and comprising at least one casing enclosing a radio-acoustic signal receiver, a mooring rope attached at one of the ends thereof to an anchored mooring point, a release mechanism allowing said buoy to rise to the surface, and a battery;
• the securing system including a signalling element capable of floating on the surface and connected to the buoy by a link, said securing system wherein including a reversible coupling device comprising an attachment member secured to the end of the link opposite the signalling element, a complementary attachment member rigidly connected to the buoy and capable of engaging with said attachment member in order to allow the link to be rigidly connected to or separated from the buoy, a pressure sensor, and a control unit associated with a time-measurement unit, said control unit instructing said complementary attachment member to separate from said attachment member when a pressure variation, measured by associating said pressure sensor and said time-measurement unit, is higher than a setpoint value.