Listen to the episode: It was while spearfishing that I lost my sling, and it landed on a metal boat below me ... it's a German U-boat." That discovery always stayed with me.

The U-boat was not some near-mythical creature as ... In today’s episode, we are going to climb inside the pressure hull of these metal sharks of the seas and attempt to better understand ...

The weapon would be the submarine, U-boats. On a desolate mud bank in the salt marshes of Kent lies the metal carcass of a First World War German U-boat. British ships were blockading German ports ...