Abstract: An underwater vehicle able to float on the surface of the water comprises a body delimited at least partially by a curved surface, the body defining an enclosure, the underwater vehicle comprising an arm mounted with at least one emitter or at least one receiver of electromagnetic waves, the arm being linked to the body by an articulation joint with a degree of freedom in rotation about an axis of rotation, the articulation joint allowing the arm to pivot reversibly between a retracted position, in which the arm is housed in the enclosure and is flush with the curved surface of the body, and a deployed position in which the arm extends out of the enclosure, the arm comprising a curved outer surface along the length of the arm, being flush with the curved surface of the body when the arm is in its retracted position.

Abstract: A marine object able to float on the surface of the water comprising a body delimited at least partially by a curved surface (4) comprising a housing (6) emerging on said curved surface (4), said marine object (1) comprising a deployable emitting/receiving device comprising an arm (8) on which are mounted means for emitting and/or receiving electromagnetic waves, said arm (8) being linked to said body (3) by means of an articulation with a degree of freedom in rotation about an axis of rotation, the articulation allowing the arm (8) to pivot reversibly between a retracted position, in which the arm (8) is housed in the housing and is flush with the curved surface (4), and a deployed position in which the arm (8) extends out of said housing (6), the arm comprising a first surface, called outer surface, the outer surface being curved along the length of the arm (8), said outer surface being flush with said curved surface (4) and following the curve of said curved surface (4) when the arm (8) is in its retracted

Abstract: An acoustic antenna element for receiving and/or emitting low-frequency underwater waves comprises an acoustic panel formed by at least one acoustic pick-up enclosed in a flexible jacket, the acoustic panel being generally rectangular and being mounted against a curved support by a mounting device including a clamping device comprising at least two flanges the ends of which are mounted on the support, the respective flanges comprising at least one tie between the two ends thereof, and the clamping device capable of adjusting the tension in the ties between the two respective ends thereof, the flanges being arranged so that the support is bent between the two respective ends of the ties and so that the panel is clamped against the support by the ties when they are under tension.

Abstract: An acoustic antenna element for receiving and/or emitting low-frequency underwater waves comprises an acoustic panel formed by at least one acoustic pick-up enclosed in a flexible jacket, the acoustic panel being generally rectangular and being mounted against a curved support by a mounting device including a clamping device comprising at least two flanges the ends of which are mounted on the support, the respective flanges comprising at least one tie between the two ends thereof, and the clamping device capable of adjusting the tension in the ties between the two respective ends thereof, the flanges being arranged so that the support is bent between the two respective ends of the ties and so that the panel is clamped against the support by the ties when they are under tension.