Duration
60 minutes
Series Info
Season 2 Episode 3
Quick Summary
How the development of U-boats changed the shape of naval warfare
About This Program
How the development of U-boats changed the shape of naval warfare, introducing the world's first stealth weapon and forcing Allied forces to adopt new tactics to fight back
Draining the North Sea: Submarines at War broadcasts on National Geographic Channel HD at 4:00pm, Tuesday, 9 December 2025. (Subtitles, repeat)
Channel Numbers:
Sky HD760Virgin183