To the app:
NB! To install the app you have to be connected to the NSSS-network. Then you can use it offline/with other internet connections for 3 months, before you have to open the app again while on the NSSS-network to keep it active.
The atlas can also be used on PC or Mac. It is recommended to use the Internet Explorer browser, and you have to be connected to the NSSS-network.