Sweden: 'Gay sailor' sign to ward off foreign submarines - BBC News
German Submarine Activities on the Atlantic Coast
The world's only recorded accident between a car and a submarine. A Volvo PV544 crashed into a docked sub in Lysekil, Sweden on the 19th of August 1961. : r/interestingasfuck
Gotland-class submarine - Wikipedia
The Real Risks of Australia's Submarine Deal | Asia-Pacific Leadership Network