What methods are considered acceptable for determining cargo weight?

Using scales and manufacturer specifications is the accepted method for determining cargo weight because it provides an accurate and reliable measurement. Scales can directly weigh the cargo, ensuring that the weight recorded reflects the actual physical weight, which is crucial for safety and compliance with regulations. Manufacturer specifications can supplement this by providing details on the weight of packaged items, especially when individual items are consistent in their weight as indicated by the manufacturer. This approach minimizes the risk of discrepancies that could arise from other methods, ensuring that the weight is precise and adheres to safety protocols, weight limits, and distribution requirements.

Meanwhile, relying solely on visual inspections does not provide a reliable weight measurement, as it is subjective and can lead to inaccuracies. Guesswork based on cargo type could easily result in significant errors, as different items may vary widely in weight even if they belong to the same category. Lastly, postal weight guidelines are not tailored specifically for cargo but rather for mailing purposes, making them less relevant for determining weights critical to shipping and aircraft load management. Therefore, using scales and manufacturer specifications is the most trustworthy approach among all options.