The only approved material for chocks is?

The appropriate material for chocks is rubber because it offers several beneficial properties that make it ideal for this application. Rubber provides excellent grip and friction on various surfaces, helping to prevent the movement of aircraft during loading and unloading, as well as during parking. Its flexibility allows it to conform slightly to the surface it is placed against, enhancing stability and ensuring a secure hold. Additionally, rubber is resistant to various weather conditions and has good longevity, making it suitable for frequent use on ramps and in various operational environments.

While other materials like plastic, metal, and wood might have some use in different contexts, they do not typically provide the same level of performance or safety that rubber offers for chocks. For example, plastic may lack the necessary durability and grip, while metal can be too rigid and potentially damaging to the aircraft and ramp surface. Wood, while having some advantages in specific scenarios, can absorb moisture and deteriorate over time, which may compromise its effectiveness. Thus, rubber stands out as the recommended material for ensuring safety and efficacy in aviation operations.