The U-boat war in Maps

The Bay of Biscay

This body of water was known as the Valley of Death among U-boat men from 1943 onwards. At that time the RAF had gained total air supremacy all over the bay and was sinking U-boats only few hours from their bunkers. The failure of the Luftwaffe to protect the area is baffling.

German U-boats lost in the Bay of Biscay

Positions within 43.00N, 12.00W and 48.20N, 01.00W

This map shows U-boats lost at sea, a significant portion of the overall U-boat losses. Here the Flak-boats were experimented with in an attempt to fend of the allied aircraft. One of the means to combat the ever-present aircraft in this area was the Piening-Route of 1943.

Selected media links


U-Boats Beyond Biscay

Bernard Edwards (2017)


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($ 22.61)

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(£ 19.99)

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(EUR 20.94)


Black May

Gannon, Michael (1998)


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($ 23.78)

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(EUR 31.23)


Bloody Biscay

Goss, Chris (1997)


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(EUR 28.11)


RAAF Flying Boats at War

Leach, Joe (1999)


The Maps