How are PAC3 MRT canisters identified visually?

The identification of PAC3 MRT canisters is marked by specific visual characteristics that allow personnel to distinguish them easily and safely. The presence of a 4-inch bronze square on the top left corner and the rear right corner serves as a prominent visual cue, alongside the word "INERT" on the side. This marking indicates that the canisters do not contain live rounds and are safe for training purposes, reducing the risk of confusion when handling or storing munitions.

Such specific identification helps ensure that personnel can quickly and accurately determine the status of the canisters without needing to rely on additional documentation or electronic means, thereby facilitating safe operational procedures. The other options may include markings or identifiers that are not relevant to the specific context of PAC3 MRT canisters, which reinforces why the distinctive bronze marking with "INERT" is the recognized method for visual identification.