Which aircraft has the highest ACL among the following?

The C-5A/B aircraft is known for having the highest ACL (Allowable Cargo Load) among the options presented. The C-5 series, particularly the C-5M Super Galaxy, is designed for long-range strategic airlift of oversized cargo, with the ability to carry a substantial payload, which includes heavy and large cargo items that other military transport aircraft cannot accommodate.

The C-5A and C-5B variants have a maximum payload capacity that significantly surpasses that of the other aircraft listed. The C-17 Galaxy and C-130 J have respectable cargo capacities but do not match the sheer volume and weight that the C-5 variants can handle. The C-5 is equipped with features like a large cargo bay and the ability to load oversized items via a nose that can be raised, facilitating easier access for loading and unloading.

Understanding the significant payload capacity of the C-5A/B is crucial for planning logistics and operations in military scenarios, where efficient transport of heavy equipment can be vital to mission success.