[QUOTE=ombugge;190555]I have been told that the Swedes invented magnetic mines and sold them to Germany.
They also invented the degaussing system and sold it to UK.[/QUOTE]
I didn’t know that. I remember when we sailed from Africa to the North Sea, we had to degauss the hull before we got there, because apparently these wwII mines are still a hazard up there. I don’t know for sure, but I think they used the impressed cathodic system to do the degaussing… Does that sound likely? I think in WWII they were just dragging fat, electrified cables down the outsides of the hulls. I visited the Mercer, an American Built wooden minesweeper from that time, in Den Haague. The ship was closed to tourists because there was a meeting of Dutch WWII naval veterans doing their thing there. So I walked up the gangway anyway and explained myself. Those guys invited me on board and gave me my own tour. The Dutch are so lovable. A couple years later, I found myself living in the shipyard (now marina) where the Mercer was built.