![Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940 Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940](http://ahoy.tk-jk.net/Images10July22-2005/SubPens/StNazairePen.jpg)
Ahoy - Mac's Web Log - The U-Boats pens in the Bay Of Biscay ports. Built after France collapses in June of 1940
Ships & Models by Erick Navas - A submarine pen (U-Boot-Bunker in German) is a type of submarine base that acts as a bunker to protect submarines from air attack. The term
![La Pallice German Submarine Base During The Second World War La Rochelle France Images Of Different Parts Of The Bunker Stock Photo - Download Image Now - iStock La Pallice German Submarine Base During The Second World War La Rochelle France Images Of Different Parts Of The Bunker Stock Photo - Download Image Now - iStock](https://media.istockphoto.com/id/1040625910/photo/la-pallice-german-submarine-base-during-the-second-world-war-la-rochelle-france-images-of.jpg?s=1024x1024&w=is&k=20&c=wEBxXi-YoX8q9pAUUgxcUQGl1FHphxN59laQV-xGu6Q=)