In October 2014, Sweden launched a huge and ultimately fruitless military operation after a sighting of what it thought was a Russian submarine in Kanholmsfjärden in the Stockholm archipelago.
It should be noted that the Swedish Navy has put on dozens of searches for foreign submarines apparently spotted, since the early 1980s, however, these searches resulted in nothing.
Faced with the embarrassment of never having caught a foreign sub, the Swedish Government has now said it will spend about $690 million increasing anti-submarine capabilities.
