What is often the only viable transport method for cargo to isolated areas?

Air shipment is often the only viable transport method for cargo to isolated areas due to its speed and ability to access remote locations that may lack infrastructure for road, rail, or seaport access. In many cases, isolated regions do not have any other forms of transportation that can deliver goods efficiently, especially for time-sensitive items or perishable goods that need to reach their destination quickly.

In contrast, trucking is generally more applicable to regions with established road networks, which may not be available in very remote areas. Rail transport requires tracks and connections that are typically absent in isolated areas, limiting its effectiveness. Shipping by vessel also necessitates proximity to ports, leaving those in true isolation without the option of maritime transport. Thus, air transport remains the preferred choice for these scenarios due to its flexibility and capability to reach hard-to-access locations directly, regardless of ground infrastructure limitations.