Denne videoen beskriver godt konvoienes stadige kamp for livet. Trusselen fra tyske ubåter var reell. Ragnar deltok ikke i konvoi HX229, som denne filmen beskriver, men opplevelsen var nok ganske lik. For Admiral Karl Donitz, disrupting Allied merchant shipping from North America to Europe required a force of 300 submarines. By January 1943, he had the number of U-boats he needed. From: HELL BELOW: Atlantic Showdown