When I worked for Western Geophysical, we used to design software to navigate ships when dragging sensors. So that analysists would know where the sensors were when they took their measurments. While this software might fit in some "additional categories, there is no main classification that fits. Thus by the rules this software would be misclassified!
There is a new Additional Category Maps (bug 20187), but I am not sure whether it fits your needs well.
Sorry for the noise, reassigning to new (since 2 years) maintainers (Ryan & David).
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