Originally Posted by
irishguy28
A base is an airport where an airline maintains a presence including, but not limited to, having their own staff there and their own planes based and flying from there; if they have a large enough presence and enough transfer opportunities, it may become a "hub".
But then with def, SK surely has already quite a bunch of bases outside Scandinavia. There is SK staff, and SK planes overnight, SK agents etc. in at least several airports in US and Europe.