Abstract: A container ship includes a hull, propulsion device, support, guide disposed on the support that is extendible beyond the hull, and handler movable along the guide. Thus, the container ship enables containers to be unloaded near a variety of points of use, i.e., not only in ports that are not equipped with port handling facilities, but also onto unequipped beaches, banks, or landing slips. The container ship also unloads containers in such a manner that it has practically no effect on the equilibrium of the ship, whatever its size.

Abstract: The present invention relates in particular to an autonomous container ship of the type having a hull, propulsion means, and loading and unloading means, characterized by having ballasting means and means (11, 12, 5) for varying the air draft without changing the draft.

Abstract: The present invention relates in particular to an autonomous container ship of the type having a hull, propulsion means, and loading and unloading means, characterized by having ballasting means and means (11, 12, 5) for varying the air draft without changing the draft.

Abstract: A sliding box for placing a film of insulating or draining material within a trench has a front section for receiving a roll of film and a rear section for delivery of the film into the trench. Between the front section (2) and the rear section (13), the box has a connecting chamber (4) provided at each end with a pair of rollers (5-6, 7-8) mounted within said chamber by means for varying the lateral spacing of the rollers of one and the same pair between an active position in which the two rollers grip the film (3) and a position of relative withdrawal in which the film passes freely between the rollers.

Abstract: A vertical drainage element is constructed and laid in position while at the same time forming a narrow vertical channel in the ground by means of an excavating machine or trencher by performing the following successive operations:a strip of filtering material is unwound from a rotating roll of strip behind the trencher;the strip is introdued within the channel formed in the ground while being shaped in the form of a trough, the bottom of the trough being placed at the bottom of the channel while the side walls of the trough are placed against the channel walls;the top edges of the trough are held in position one against the other while filling the trough with bulk material in granular form which subsequently constitutes a vertical filtration block;the top edges of the trough of filtering material are closed on top of the completed block and are fastened together so as to form a closed jacket around the block.