The U-boat was the "workhorse" of the war and was considered the best and deadliest. There were an approximate total of 2792 vessels lost during the war.
It sank up to 2,779 ships in world war 2
In convoys, many ships sailing together protected by warships to hunt for German U-boats (submarines)
German U-Boats sank over twenty-four ships off of Florida's Atlantic and Gulf Coasts during World War 2.
4800 men on the ships
They were there to sink as many ships as possible. Some were given the role of landing spies but that was always subordinate to the role of sinking ships.
In civilian ships alone, the figure was in the thousands. <><><> During WW II, German U-Boats sank 175 Allied warships; 2,825 merchant ships
The Atlantic Theatre was not home to many battles, but there was an abundant population of German submarines with orders to sink any Allied ships or ships going to Britain.
There are about 80,000 ocean-going ships in the world.
In World War II, German U-boats sank many ships off the coast of North Carolina.
There are too many to list. Go to Google and type in "German ships awarded as war reparations" -- you will find dozens of websites giving the names and details of the relevant ships, including to which countries they were awarded.
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4 ships were torpedoed in World War 1.