# Database Builder Use Database Builder to specify a `Type` for all `Aircraft`, `Watercraft`, `Warship` and `Anti-Aircraft` assets. This will ensure that Tacview uses an appropriate 3d model during replay based on callsigns which were specified in the `GPX` and `EAG` files. In Tacview, navigate to `Add-Ons` -> `Database Builder` ![Open Database Builder](/files/z5J96wIJLBROynmCTB2E) Use the tool to enter the details of each `Aircraft`, `Watercraft`, `Warship`, or `Anti-Aircraft` group. Optionally specify an engagement range for ships and SAMs, which will be displayed in Tacview as a dynamic hemisphere surrounding the unit. If you do not specify an engagement range, a default one may apply. Save your file in `%ProgramData%\Tacview\Data\Database\Default Properties\` ![Fill Database Builder](/files/1W23HJtXtFIUs1qiexP0) Your custom database is now saved so that it will be automatically loaded every time Tacview is launched. ### Troubleshooting: If the Database Builder add-on is not showing in the add-on menu, installing the following libraries should help: [Microsoft Visual C++ Redistributable for Visual Studio](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist) [Microsoft .NET Framework Runtime](https://dotnet.microsoft.com/download) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://raia-software-inc.gitbook.io/tacview/tacview-enterprise/database-builder.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.