The second tool is a dedicated navigation tree. This tree shows all the architectures contained in the HOPEX repository. This is a more common tool for the HOPEX Modeling users since a large set of navigation trees are already available.

The NAF navigation tree starts navigation from two points: the architectures and the NAF dictionaries.

By default, the NAF navigation window displays the repository in which the NAF architectures are located. It also contains an "Architectures" folder in which all the architectures of the current repository are located as well as a "NAF Dictionaries" folder which contains the official DoDAF terms and acronyms, if imported, approximately 50% of which are approved by NATO.