Stranraer and its surrounding area saw a significant amount of activity during the Second World War, as it became a focus for anti-U-boat work. Flying boats operated from the area in an attempt to secure the waters of the North Channel and the south western coast of Scotland. Almost all of Britain's shipping imports passed through those two sea areas en route to the Clyde or the Mersey. Indeed, the flying boat "Supermarine Stranraer" is named after the town. Winston Churchill himself departed from Stranraer in a Boeing Flying Boat on the night of 25 June 1942, when making his second visit of the war to the USA. Churchill also spent time at nearby Knockinaam Lodge during the war years.