When loading flare and chaff cartridges, how many containers should be opened at one time?

Opening only one container at a time when loading flare and chaff cartridges is primarily focused on safety and maintaining control over the materials being handled. This practice minimizes the risk of accidental ignition or mishandling, which is crucial given the hazardous nature of pyrotechnic materials. By limiting the number of opened containers, personnel can more easily manage their workspace, stay organized, and ensure that the loading process is conducted in a controlled manner. This method also adheres to safety protocols, which often dictate the handling of explosive or flammable materials in a way that reduces potential risks. The emphasis is on careful management of the materials to prevent mishaps that could occur from having multiple containers opened simultaneously.