When a NATO person enters the URL for an iGeoSIT server, it checks first to see if the user has a locally cached copy of the client, a mapping utility.
The request is replied with a JPG image and a redirect if there is a live overlay, such as current positions of a patrol or aircraft.
iGeoSIT clients are used by analysts and operators to geospatially reference events or perform terrain analysis.
For example, a units current location can be visually compared to a SQL response which contains the geospatial data point for a nearby military outpost.
The Java tool has things like rulers to physically measure distance(s), or draw shapes for export to PowerPoint for a mission brief, or event log.