Which rule regarding air shipment is incorrect?

The assertion that air shipment is always more expensive than truck is an incorrect generalization. While it is true that air freight tends to be more costly due to higher operational expenses, the actual cost comparison between air shipment and truck shipment can vary significantly depending on several factors. This includes the distance being transported, the weight and volume of the cargo, fuel prices, and seasonal demand fluctuations. In some cases, for smaller or time-sensitive shipments, air transport might be the most cost-effective option when one considers the overall value derived from the reduced transit time and the associated benefits for urgent delivery.

In contrast, air shipment does indeed offer faster transit times compared to truck transport, particularly over long distances such as those exceeding 700 km, due to the ability of aircraft to cover significant distances in a short period. Weather-related delays are also a common challenge for air shipments, affecting schedules and delivery times. Additionally, air shipping is subject to geographical restrictions, as not all locations have the necessary airport facilities to accommodate air cargo services. Thus, the other statements regarding air shipment maintain factual accuracy.