A projectile including: a shell; a rotating shaft; and a screw which can be rotated by the rotating shaft. The screw and the shell include, respectively, a stop and a counter-stop opposite each other. The screw is capable of sliding axially between a first position, in which a non-zero clearance is provided between the stop and counter-stop, and a second position, in which the stop and counter-stop are in contact. An elastic return element reversibly deformable between a first and a second state of stress which correspond to the first and second positions of the screw, respectively, the stress of the first state being lower than the stress of the second state.

A launching device and associated methods can be utilized to launch an underwater running body from a platform such as a watercraft. The launching device may include a ramp, which extends along a longitudinal ramp axis, and a propellant deflection unit. The ramp may enclose an underwater running body with a propulsion unit underwater. The launching device may activate the propulsion unit, which then emits a propellant. The propellant deflection unit deflects the emitted propellant into an outlet direction. This outlet direction of the propellant may be directed perpendicularly or obliquely away from the platform.

A launching device and associated methods can be utilized to launch an underwater running body from a platform such as a watercraft. The launching device may include a ramp, which extends along a longitudinal ramp axis, and a propellant deflection unit. The ramp may enclose an underwater running body with a propulsion unit underwater. The launching device may activate the propulsion unit, which then emits a propellant. The propellant deflection unit deflects the emitted propellant into an outlet direction. This outlet direction of the propellant may be directed perpendicularly or obliquely away from the platform.

Underwater craft including means for launching an underwater vehicle using water pressure, including a vehicle-launching tube having a front part and a rear part and the rear part of which is connected to a water distribution tank itself connected to a water tube in which is positioned a piston for delivering water into the rear part of the tube in order to push and eject the vehicle, is characterized in that the piston is associated with a linear electric actuator for moving same.

Underwater craft including means for launching an underwater vehicle using water pressure, including a vehicle-launching tube having a front part and a rear part and the rear part of which is connected to a water distribution tank itself connected to a water tube in which is positioned a piston for delivering water into the rear part of the tube in order to push and eject the vehicle, is characterized in that the piston is associated with a linear electric actuator for moving same.

A projectile including: a shell; a rotating shaft; and a screw which can be rotated by the rotating shaft. The screw and the shell include, respectively, a stop and a counter-stop, opposite each other. The screw is capable of sliding axially between a first position, in which a non-zero clearance, is provided between the stop and counter-stop, and a second position, in which the stop and counter-stop are in contact. An elastic return element reversibly deformable between a first and a second state of stress which correspond to the first and second positions of the screw, respectively, the stress of the first state being lower than the stress of the second state.

A projectile including: a shell; a rotating shaft; and a screw which can be rotated by the rotating shaft. The screw and the shell include, respectively, a stop and a counter-stop, opposite each other. The screw is capable of sliding axially between a first position, in which a non-zero clearance, is provided between the stop and counter-stop, and a second position, in which the stop and counter-stop are in contact. An elastic return element reversibly deformable between a first and a second state of stress which correspond to the first and second positions of the screw, respectively, the stress of the first state being lower than the stress of the second state.

A projectile launch detector including a body, a mast and a blade rigidly connected to the mast; the mast being capable of sliding between a retracted configuration and a deployed configuration, and capable of pivoting between a first and a second angular position. The detector may further include a first elastic return element to return the mast to the deployed configuration relative to the body; and a first associated sensor; and a second elastic return element to return the mast to the first angular position relative to the body; and a second associated sensor.

A projectile launch detector including a body, a mast and a blade rigidly connected to the mast; the mast being capable of sliding between a retracted configuration and a deployed configuration, and capable of pivoting between a first and a second angular position. The detector may further include a first elastic return element to return the mast to the deployed configuration relative to the body; and a first associated sensor; and a second elastic return element to return the mast to the first angular position relative to the body; and a second associated sensor.

A method for countering an oncoming threat is disclosed. A location in front of the threat is selected, and a generally spherical volume is defined by a plurality of lines deployed from a centrally located communications unit. Sensors associated with the lines are connected to the communications unit and sense presence of the oncoming threat, whereupon countermeasures are activated responsive to the sensed oncoming threat.