Rubber airbag buoys for towing and launching, launching balloons or launching balloon rollers are specialized terms used in the shipbuilding and repair industry, researched and developed by the largest shipbuilding center in Qingdao, Shandong - China and widely used for over 20 years. The principle of this method is very simple, which is to use a number of rubber bags inflated with compressed air at a certain pressure level (depending on the load of each ship). After inflating the airbag to lift the ship to a certain height from the ground, the tubes and supports used to support the ship during the building or repair process are removed from the bottom of the ship, and at this time the entire weight of the ship is pressed on the air cushion. With the ground arranged with a gentle slope of about 10% to the water's edge combined with an electric winch to pull and release the ship to move on the air cushions like the method using rollers and levers. The ground used for shipbuilding has been constructed flat, sturdy enough and has a suitable slope. Connected to the ground is a sloping platform paved with sandbags. When the ship has moved to the platform, the winch mechanism is turned off so that the ship can slide down into the water while still on the air cushions. The air cushions produced by the Qingdao Pressure Air Cushion Factory in China have a usable length of L=5-24m, a diameter of D=0.8-2.5m, and the number of rubber layers from 3-10 layers or more. There are valves at both ends of the air cushions to pump or release air during the launching process. Depending on the weight of each ship, people will fill the air with a pressure of 0.05-0.15 Mpa into the air cushions. Also depending on the weight of the ship, decide how many air cushions to use for the launching process. All must be included in the pre-calculated launching plan. The launching method using airbag cushions (soft launching) is very easy to adjust the speed of ship launching, ensuring high technical requirements better than the traditional launching method (hard launching). The launching method using airbag cushions saves a lot of time, effort, and money in the process of leveling the construction site of the industrial yard, launching ramp and purchasing airbag cushions compared to calculating the launching by the traditional method. On the other hand, the launching method using airbag cushions is less dependent on the tide (only needs a 3m tide level). In addition, with this technology, shipyards do not need to build ramps and the airbags can be reused. Therefore, it brings many benefits and creates significant economic efficiency.