The countermeasure mapper enables the user to select countermeasure(s) using the Defense-in-Depth view to visually determine their coverage of SPARTA techniques/sub-techniques. This feature is particularly useful when chaining together countermeasures to build a security architecture for the spacecraft. Before selecting any countermeasures, all the techniques/sub-techniques will appear in red but as the user selects a countermeasure, the techniques/sub-techniques turn green indicating some level of coverage and risk reduction. It is important to understand that a single countermeasure typically cannot fully prevent a TTP but it aides in risk reduction for the spacecraft. When done selecting the countermeasures, the user can export the TTP graphic but more importantly the user can export the data to Excel. The Excel workbook will report the selected countermeasures, the TTPs covered as well as the gaps in TTP coverage in respective tabs of the workbook. From a security engineering perspective, this will ensure system designers can better understand where their gaps and potential risk resides.