Near South American oil fields.
The refinery. They produced jet fuel for the Americans
It's located near South American oil fields.
It's near South American oil fields.
Oilers then merchantmen.
Whenever they became a target of opportunity.
Allied cargo ships were the Germans primary targets.
RAF Bases
Liverpool
The Jews were the main target in Germany. The German genocide is also called the Holocaust.
Main weapons of German subs were torpedoes and a cannon on the foredeck. If the target was entirely unarmed and the conditions good the sub would have surfaced and then used the gun. Poorer conditions, or an armed target forcing the sub to remain hidden would have caused the torpedoes to be used instead.
The Sussex Pledge was made by Germany after the US threatened to cancel diplomatic relations with Germany after Germany sunk a French channel ferry, Sussex, during WWI. The pledge stated that German submarines would not target passenger ships or merchant ships unless the presence of weapons had been established.
They use Sonar to send sound waves to the bottom of the oceans.