Ship landing airbag for ship launching have the best designed structure which consists of five different functional membranes in rubber layers.
1) Outer Rubber Layer
The outer rubber layer that covers the outside of marine airbag to protect under layers from abrasion and other external forces. This compound

has sufficient tensile and tearing strength to withstand any condition and hard usage.
2) Inner Rubber Layer 
The inner rubber layer seals pressurized air inside marine airbags.
3) Synthetic-Tire-Cord Layer as Reinforcement
The reinforcement cord layers, which are made of synthetic-tire-cord commonly used in tires, are arranged at ideal angles to hold the internal pressure and distribute stress evenly. So they can provide strong efficient reinforcement. 

An rubber roller airbag is to be constructed of an outer rubber layer, one or more synthetic-tyre-cord layers, and an inner rubber layer. The arrangement of synthetic-tyre-cord reinforcement layers is shown in the picture below, all materials shall be vulcanized firmly.

1. Airbag for ship upgrading, conversion or new/repair launching (Ship launching airbags)
2. Airbag for hoisting and transporting heavy goods up to 10,000 tonnes structure
3. Marine pneumatic rubber fender for protective purposes
4. Marine airbag for salvaging sunken ship or heavy immersed steel structure weighing up to few thousand tonnes
5. Pneumatic rubber core for architecture engineering
6. Container for storing and transporting gas, corrosive chemical liquid and pure water 
7. Rubber bag for ship ballast
8. Airbag for construction and floating of bridge or pipeline

Over pressure Control:
Strictly control the operating pressure, over pressure is forbidden.
The Landing Slipway Requirements:
The landing ground should be ground or cement concrete, according the tonnage of different ships.
Avoid Sharp Objects(most important):
Make sure no sharp objects and smooth & clean ground during using airbags in case of any break.
Avoid Distortion And Overweight:
Avoid distortion in the length direction during rolling and avoid overweight load after gas charging.

1.The airbags should be maintained in a dry ventilated room and be protected from light. 
2.The airbags should be in a relaxed condition free from tension, compression or other deformation.
3.The airbags should be kept away from any heat source.
4.The airbags should be protected from acids, alkalis, oils or organic solvents.