Abstract: A method for locating drifting gear, including at least the following steps: —anchoring a submerged beacon to one of the ends of the drifting gear, the submerged beacon being equipped to rise to the surface and including a casing enclosing a transceiver of a radio-acoustic signal associated with a control unit, and a release mechanism allowing the beacon to rise in response to reception of a code and an order by the control unit, —geolocating the start point of the drifting gear, in order to allow the fisherman to delineate the region of its location by estimating the drift of his drifting gear from the start point so as to direct the search for the drifting gear in the estimated direction, —locating the drifting gear using the submerged beacon.

Abstract: A system for securing a submerged buoy including a signalling element floating on the surface and connected to the buoy by a link, said securing system being wherein it includes 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 secured to or released from the buoy, a pressure sensor, a control unit associated with a timemeasurement unit, said control unit ordering 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 set value.

Abstract: A system for securing a submerged buoy including a signalling element floating on the surface and connected to the buoy by a link, said securing system being wherein it includes 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 secured to or released from the buoy, a pressure sensor, a control unit associated with a time measurement unit, said control unit ordering 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 set value.

Abstract: This invention relates to a submerged buoy (1) consisting of: a housing (2) containing a receiver (4) of a radioacoustic signal; a mooring rope (11) with one end attached to a mooring point; a mechanism for releasing said buoy, allowing it to return to the surface; and a flotation reserve; said buoy being noteworthy in that the release mechanism (7) is of electromechanical type and is enclosed in a hermetically sealed tank (5) which thus forms the flotation reserve; said mechanism (7) controlling a catch (8) which either prevents or allows the free rotation of a winding drum (10) around which the mooring rope (11) is wound. This buoy may be used particularly for marking submerged objects such as fishing equipment, nets, fish pots etc., for controlling mooring sites in pleasure ports or even to mark off a sensitive area (such as around an underwater mine).

Abstract: This invention relates to a submerged buoy (1) consisting of: a housing (2) containing a receiver (4) of a radioacoustic signal; a mooring rope (11) with one end attached to a mooring point; a mechanism for releasing said buoy, allowing it to return to the surface; and a flotation reserve; said buoy being noteworthy in that the release mechanism (7) is of electromechanical type and is enclosed in a hermetically sealed tank (5) which thus forms the flotation reserve; said mechanism (7) controlling a catch (8) which either prevents or allows the free rotation of a winding drum (10) around which the mooring rope (11) is wound. This buoy may be used particularly for marking submerged objects such as fishing equipment, nets, fish pots etc., for controlling mooring sites in pleasure ports or even to mark off a sensitive area (such as around an underwater mine).