For a AUV, a flask for electronics was made, the basis of which was aluminum of the AlMg5 brand 4 mm thick, this brand of aluminum was chosen based on its properties, it allows you to connect parts by welding with argon-arc welding, and is also resistant to oxidation. For the cover of such a case, a transparent material in the form of acrylic, 10 mm thick, was chosen, the transparency of the material provides visual control of the presence of unwanted liquid in the volume of the body of the underwater vehicle, so that the screws securing this cover do not cause its destruction, a flange was made that distributes the clamping force of the screws evenly over the surface area of ​​the lid. The flange was made as a single part on a 3D printer, from PLA material, the cover, in turn, was milled on a CNC portal milling machine, it also processed the workpieces and removed the level of the fit plane of the covers, it is worth noting that in the cover the groove was milled with a spherical cutter with a circle radius of 2 mm, which made it possible to put a mechanical seal with a diameter of 4 mm into it, the length was calculated in advance using specialized formulas. In order to make sure the tightness of the fabricated structure, air was extracted from it using a Value 115N vacuum pump, the tightness was checked with a pressure gauge for filling the air conditioner, which shows not only excess pressure, but also the vacuum depth. For For the shape of the case, a rectangular parallelepiped was chosen, based on the fact that most of the components used in the control system have a rectangular shape and thus it is possible to provide the most ergonomic arrangement of them in the internal volume of such a figure.

It was a successful experience and we managed to significantly reduce the weight of the apparatus without sacrificing strength.
The size of the carrier is 476 x 215 mm.
The size payload module is from 400 x 135 mm to 440 x 150 mm