Abstract: The present invention is a double-hull submersible tanker with a surround-the-hull multi-propulsion system comprised of the revolving front-drive propulsion unit in the bow, three rudders and three propellers connected over the hull to three vertical ducts integrated in the hull by their lower ends and connected by upper ends to three ballast tanks/drilling and landing platforms floating over the hull, with the stern having the rudder, propeller and a jet thruster, propelling the water pumped in by the front-drive unit. The article is a combined floating/submerged system, which travels simultaneously on the water surface and below the water level, i.e. the hull is fully submerged after the loading and remains in said suspended position due to three ballast tanks/drilling and landing platforms floating on the water surface and used for oil exploration and to refuel helicopters and VTOL aircrafts.

Abstract: The present invention is a double frame armor comprised of the base metal plate covered by graphite and of exterior metal plate covered by graphite and galvanized rubber. Replaceable metal sections containing reactive metal and chemical grains are sandwiched between the armored double frame—the article, constituting the double hull of a tank, armored vehicle, ship, submarine, aircraft or spacecraft. Impact of a projectile, missile, mine or meteorite on the article triggers a chemical reaction of said reactive elements effective to increase the stiffness of the armor and prevent its fracture, and sufficient to solidity into armor and patch the fracture.

Abstract: The present invention is a semicircular, sharp bow submarine with a revolving front drive propulsion unit used to create a vortex to accelerate the invention, and to emit compressed air and insulating bubble-creating substances to reduce friction and prevent sonar detection. The invention has a double, steering-propelling system consisting of the rotating fin-superstructure carrying two jet engines adjustable at variable angles, and four water tanks—jet propulsion devices in the bottom, the middle section of which slides downward to launch underwater vehicles, submersible aircrafts and torpedoes and retracts after retrieving underwater vehicles and submersible aircrafts. This invention is a new means in underwater travel.

Abstract: The present invention is a semicircular, sharp bow submarine with a rotating front drive propulsion unit, rear dock, top fin with a horizontally rotating wheel-shaft, and four water tanks—jet propulsion devices in the bottom. This invention is a new means in underwater travel.