At first, I was wondering how this could have happened...
Then I saw that this took place in Hordaland, about 50km outside of Bergen; which is often referred to as "The Texas of Norway", and things began to take shape.
And then I remembered that the frigate was of course crewed by military personnel, and the final pieces fell into place.
Is not 50km enough distance to quarantine Bergen from maritime traffic?
Well Bergen's a coastal city for one, and also Bergen likes to consider itself its own country, playing into the Texas stereotype. More importantly, the Bergenese people and their ridiculous dialect have spread throughout the rest of Norway, presumably in preparation for The Great Secession, when they shall distract and interrupt the government long enough for those watching from home to renounce the Norwegian monarchy and parliament, and instate themselves as sovereign rulers of The Democratic People's United Republic of Bergen. Finally, Brann will become an international football league,
because they won't have any choice....I'm exaggerating, of course. Bergen's a nice place, although building a city on a perpetual 20 degree incline in a climate where it rains every 6 out of 5 days... Yeah, probably not the best choice. People from Bergen do have a certain reputation, however.
This likely is more just a matter of the general Norwegian military being horrifically inept. We've got some of the scariest special forces in the world, we really do... Everyone else is just sort of "there".
Except on weekends. They get weekends off, so they're not "there".