Abstract: The invention concerns an underwater vehicle equipped with electrochemical means of electrical power generation, characterized in that it comprises a data processing unit (2) with inputs connected to sensors (4) of a parameter selected from amongst temperature, pressure, and hydrogen concentration, of the water in the area of the vehicle, and of the electrochemical means of the vehicle, and with outputs connected to means (5) of transmitting signals to transmit signals authorizing (or not authorizing) an operator to approach the vehicle, depending on whether the sensed value of the parameter of the electrochemical means is in a predetermined range around the value of the parameter corresponding to water in the area of the underwater vehicle.

Abstract: The invention concerns an underwater vehicle equipped with electrochemical means of electrical power generation, characterised in that it comprises a data processing unit (2) with inputs connected to sensors (4) of a parameter selected from amongst temperature, pressure, and hydrogen concentration, water in the area of the vehicle, and the electrochemical means of the engine, and with outputs connected to means (5) of transmitting signals to transmit signals authorising (or not authorising) an operator to approach the vehicle, depending on whether the sensed value of the parameter of the electrochemical means is in a predetermined range around the value of the parameter corresponding to water in the area of the underwater vehicle.

Abstract: This fixator (1) comprises a rigid bar (7), two pin-holder assemblies (8, 9) which can be moved relative to this bar (7), and means (13, 22) with which it is possible to immobilize each pin-holder assembly (8, 9) in a defined position relative to the bar (7). According to the invention: the bar (7) has a cylindrical main part (10) and a spherical part (11) at one end; a first pin-holder assembly (8) comprises a one-piece body (12) with a bore passing through it to permit its engagement by sliding on the cylindrical part (10) of the bar (7); and the second pin-holder assembly (9) comprises a one-piece body (15) in which a recess (16) is formed, this recess (16) having a zone of partially spherical shape with a radius slightly greater than that of said spherical part (11), this zone being such that it can receive this spherical part (11) with pivoting, without lateral play, and with a possibility of articulation of said second pin-holder assembly (9).

Abstract: This fixator (1) comprises a rigid bar (7), two pin-holder assemblies (8, 9) which can be moved relative to this bar (7), and means (13, 22) with which it is possible to immobilize each pin-holder assembly (8, 9) in a defined position relative to the bar (7).