They operate out of hiding and lurk in the depths of the oceans: submarines. When the 'submersibles' were first used over 100 years ago, hardly anyone believed in their usefulness. That changed during the First World War. For the first time, submarines operated militarily in larger numbers, and what were reconnaissance vessels quickly became hunters that sank enemy ships. The new weapon became a symbol of treachery, and submariners glorified as heroes by propaganda. Part 1 of 2.

They operate out of hiding and lurk in the depths of the oceans: submarines. Nazi propaganda celebrated them as wonder weapons, and the myth of invincibility clung to them. In the battle of the atlantic, they operated as grey wolves in packs, spreading fear and terror. During the cold war submarines became an omnipresent threat in the world's oceans. Today, submarines have not lost their terror: they are more dangerous than ever. 2 of 2