Of the 12 ‘S’ class submarines in service in 1939, only 3 were to survive the war, HMS Sealion, HMS Seawolf, and HMS Sturgeon. As the losses accumulated the S class became the subject of a defiantly morbid verse in submariners circles, based on a popular nursery rhyme:
A runway measuring about 800 by 75 yards had been prepared with local labour, which had also swept the snow from a track between the main road and the lake edge. Unfortunately, only one inadequate route had been swept from the edge to the runway; this was half a mile long and a foot deep in snow, and the stores had to be conveyed over it on three horse-drawn sledges, intermittently available. The village of Lesjaskog was two miles away, so that even the provision of forage for the horses involved difficulties.