What is one of the main purposes of chains and straps in cargo tiedown processes?

One of the main purposes of chains and straps in cargo tiedown processes is to secure cargo and prevent movement. This is crucial for maintaining the safety and stability of the aircraft during flight. Unsecured cargo can shift due to turbulence or changes in speed and direction, leading to potential hazards such as damage to the cargo, injury to crew and passengers, or even compromise the aircraft's handling characteristics. By effectively securing cargo using chains and straps, aircrew ensure that items remain in place throughout the journey, adhering to safety regulations and operational procedures.

While other options may touch on related aspects of air transport operations, they do not directly reflect the primary function of tiedown equipment. For example, reducing fuel consumption and enhancing fuel efficiency could relate to overall operational efficiency but are not directly linked to the tiedown process. Streamlining loading operations is also a valid goal, yet it primarily concerns efficiency during the loading phase rather than the securing of cargo itself.