For what type of cargo would using supplemental straps be unnecessary?

Using supplemental straps is unnecessary for low profile, perishable cargo because this type of cargo typically has specific dimensions and weight characteristics that allow it to be secured effectively without additional restraints. Low profile items are often designed to fit snugly within the cargo area, minimizing movement during transport. Furthermore, perishable cargo is often loaded in a way that ensures it is secure and stable, reducing the risk of damage or shifting during flight. The design and handling procedures for this type of cargo prioritize stability, making supplemental straps redundant in this case.

In contrast, high-density, crushable, and heavy cargo often require added security measures to prevent shifting, crushing, or damage, necessitating the use of supplemental straps to ensure safe transport. These types of cargo could have varying center of gravities or may not sit as securely in the aircraft, thus needing additional restraints for stability.