Abstract: A concealment that covers all or a main part of naval vessels and their surroundings and crew, by making provision for coupling a flow of air with an injection of fluid to cause formation of a cloud and to orient the cloud to optimize coverage of the vessel and the surroundings to be protected. A concealment apparatus includes a gas turbine coupled to a conduit discharging a flow of smoke composed of a combustion gas loaded with droplets of fluid in suspension. The conduit includes two branches that emerge on each lateral half-hull of the hull of the vessel. The branches are symmetrical with respect to a vertical symmetry plane of the ship and, through their curvature, have roughly a direction oriented towards the rear of the ship. In this way, the flow of smoke is also oriented towards the rear of the ship.

Abstract: An anti-slip device is operated automatically by a driver from his cab by a hydraulic or manual system. Detachable blades each pivotable around a shaft are disposed on each drive wheel. In order to use the blades they must emerge and project from the peripheral part of the wheel, thus penetrating into the ground. The blades are successively actuated by a roller which rests against a control portion of the blade. The roller is mounted on a lever arm which is moved by a hydraulic jack or by a manual lever system. The blades penetrate the ground and thus prevent the wheel from slipping. In the operating position, the active portion of the blade transmits the penetrating force to the pivot shaft and a stop, i.e. not to the control portion.