The barrels are already known, but the submarine towing barrel, not until now.

BUOYANCY MATERIALS We can use various swelled materials of steep cellule, such as polystyrene, PVC, polyurethane, etc., in crumbs, in pieces or undivided, even air, compressed air or various gases, using artificial swelling.

COLLISION AND CRACK In case of a collision or even in case of a crack, the buoyancy room (2) cannot be overflowed by water, because of the buoyancy material (2) that fills it, except at the exact point of the occurred damage, where a small percentage of the buoyancy material will be destroyed, which will be counted-in though, so the submarine towing barrel will not sink.

DRAWINGS Drawing 1 shows the upper view of the barrel (1) in section and its useful space, surrounded by a buoyancy system (2) which forces the barrel to submerge, as well as the positive couplings (3).

Drawing 2 shows the side view of the barrel with the towboat (6) and the positive couplings (3), as well as the mole (5) with the negative couplings (4), which stops the barrel from rotating. It also shows the ability of going up and down the sea's surface when it is loaded or unloaded. Finally, it shows the cleaning spouts (8), as well as the water tanks (14).

Drawing 3 shows the backside view of the barrel and the towboat, where the propellers (9) and the steering gears (10) of the towboat are shown, with their link (11), so that it can carry the barrel along.

Drawing 4 shows the upper view of the towboat (6), its hydrodynamic line as well as the buoyancy rooms (12), which prevents the submarine barrel from rotating when carried.

Drawing 5 shoes another shape (13) of the submarine barrel, which helps it not to rotate, when carried.

TOWING While the submarine barrel is loaded, therefore sank to the surface of the sea and while it is linked to the mole, the towboat passes over it, with the rear, in the middle of which there are links (11). Sinking the submarine barrel with the water tanks (14) at the point, we connect it with the links and after we unlink it from the mole, the towboat carries it.

EXAMPLE If a submarine barrel with external dimensions 054m x 500m and internal dimensions <) 38m x 500m of useful space, full with water, the following will approximately 3 CARGO: 500.000 tons BUOYANCY AREA : 500.000 m3 This means that with such an equivalence of weight in tons to buoyancy in m3, the barrel will sink almost to the surface of the sea and not beyond.

Exact measurement will take place at the stage of the testing, when we will also test the resistance of the materials, for example in a depth of 54 meters under the sea, where the pressure is 5,4 atmospheres, which will be their behavior and which will prove to be the most suitable.

ADVANTAGES 1Stlt does not sink, even in case of a collision or crack.

2ndlt travels from both sides.

3 dut is connected to the mole by itself which means no waste time for the towboat.

4hit can carry huge cargos safely due to its size and its buoyancy system.

5'hlt is not affected by weather conditions, because it is a submarine.

6thit can be easily cleaned, as its inner part is smooth.

ARTIFICIAL SWELLING It is attained with various ways, airtight closed, such as: 1.-Plastic balls filled with air, compressed air or gases, soldered together.

2.-Plastic cubes, blowing of extruder.

3.-Plastic cubes of injection, fifty-fifty and soldered together.

4.-Plastic cubes of vacuum, fifty-fifty and soldered together.

5.-Plastic stratuses or pillows, soldered with alto-frequent.

6.-Metallic ventilators, soldered.

7.-Metallic wadded pipes.

8.-Plastic or metallic reservoirs.

9.-Plastic convex tiles of extruder, air tightly soldered at the edges, with a folding such as the one of a plastic bag sides, even with inner ribs, which are super-automatically manufactured, and so, with the cheapest cost, in every dimension and length we want, by one and only production line. The material, the hardness, the shape and the dimensions will be fixed by me during the stage of the testing and the stage of measurements, when the weight per 1 m3 will also occur for the calculation of the artificial swelled buoyancy.