This Only Happened Once in All of WW2

Video Description

German cannon fire tears into HMS Seal as she wallows in the narrow Kattegat Strait between Denmark and Sweden. British Lieutenant Commander Rupert Lonsdale stands rigid on the bridge, watching his submarine disintegrate around him. His Lewis guns, the vessel's only protection on the surface, jam one after another. Above, Kriegsmarine Arado seaplanes bank and circle back for another pass, their silhouettes stark against the dawn sky of May 1940. Lonsdale is trapped… but he knows that below deck lurks a deadlier threat. In Seal's flooded bilges two depth charges secretly wait, primed to explode if the submarine sinks past fifty feet. As fresh German fire punctures the hull and seawater floods in, Lonsdale contemplates doing something unthinkable - something that will happen only exactly once in the entire war.