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Music Hello everyone and welcome to History of the Second World War, Episode 159, The Early War at Sea Part 9, Finding U-Boats.

This week, a big thank you goes out to David, Tyler, Jan, Moritz, Trevor, and Alejandro

for choosing to support the podcast by becoming members.

You can find out more over at History of the Second World War.com slash members.

Over the last few episodes, we've discussed the actions of the Admiral Graf's Bay,

which, along with the

Deutschland, occupied many Royal Navy ships as they tried to protect British trade from the

German surface raiders. There was, of course, another threat to British trade that the

Royal Navy was also prepared for, U-boats. During the First World War, the impact of German

U-boats on British shipping had been

a shock, and it took time before the proper changes were made to combat the German submarines.

For example, convoys were not introduced until relatively late into the war.

Then during the interwar years, time would be spent by the Royal Navy preparing for the

possibility of a future war in which

submarines were a major factor. A core part of the plans that were developed were based

...