Which method is NOT a cache method for unexploded ordnance?

The direct method is not classified as a cache method for unexploded ordnance. Cache methods typically involve algorithms or techniques used to store and retrieve pertinent data regarding unexploded ordnance, aiding in their detection and disposal. Each of the other methods listed, such as the SF Method, Donor Method, and Lattice Method, represents specific approaches that optimize the storage and processing of data related to UXO.

The direct method, however, often refers to straightforward data collection processes without these specialized techniques for optimizing cache management. This distinction is crucial in the context of UXO management, as efficient data handling can significantly impact safety and operational efficiency when dealing with hazardous materials.