What format must be used for Letter reports?

The correct format for Letter reports is narrative. This format is designed to convey information in a structured and comprehensive manner, allowing for a clear and effective presentation of data, findings, and recommendations.

A narrative format typically includes an introduction that outlines the purpose of the report, followed by the main body that details the information in a logical sequence, and concludes with a summary or recommendations. This structure helps ensure that the reader can easily follow the flow of information and grasp all crucial points being communicated.

Other formats like descriptive, overview, and summary do not provide the same level of depth and clarity as a narrative. While each of these may serve different purposes in various contexts, they lack the specific organization and detail required for formal reporting in a military context, which is why narrative is the preferred choice for Letter reports.