August 3rd, 1939, on my shake-down cruise, I decide to take U-48 up the Thames Estuary - figure pre-war is the only chance I'll ever get to do this.
I go in submerged and get as far as Canvey Island, then decide to return on the surface just to show the Tommies that the Kriegsmarine goes anywhere it pleases.
Once On the surface I switch to the external camera. I then notice an unusual underwater object, black, round with spikes, and chained to the bottom. Turns out I'd been steaming submerged through a very dense mine field for about an hour.
