The swedish navy using the RIM-24 and the Mk.11/Mk.13? Doesn't seem quite right to me. Wouldn't the Swedish have produced their own equivalent?
The thing is that this AU mix what RSwN usës/Used IRL and other stuff that where around such as Sea Dart, Sea Wolf and others. The same goes for sensors. I belive that in this AU Sweden take part in some development projects like Sea Wolf and adapt them and their sensors.