Reminds me of a joint exercise the Yanks had with the
Swedes.
A Swedish sub (the Gotland class, methinks) managed to get within
torpedo firing range of a US aircraft carrier - undetected. They
even took a photo of the carrier through the periscope.
The Yanks were so badly shaken that they decided to lease the
Swedish sub for a year to figure out countermeasures against the
sub.
So, aye.... the Vastergotlands that we're getting are a pretty good
deal. 
