 Also, this was a step towards an increased ability to monitor and maintain high level of surveillance of Sweden’s harbours and shipping lanes against any foreign undersea aggression or incursion into Swedish territorial waters.The Swedish Coastal Artillery was in a constant level of development during the last century as the threat levels changed around the world, the main threat to Sweden after the World War II was the threat of a war in Europe.Even if Sweden had not been directly involved, there was always a risk of an incursion into Sweden of a foreign power during a major war in Europe.