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Convoys in WW1 were used to protect the merchant and troop ships coming to Britain, carrying food, ammunition and general supplies. The convoys comprised of a core of merchant ships (and sometimes Q-Boats, which were designed to be disguised as merchant ships, but had guns and depth charges to destroy U-boats) surrounded by navy ships, which guarded the merchant vessels. Some navy ships had hydrophones (a machine using radio waves to detect a U-boat under water.). They also went in a zig-zag route, to make it harder for the U-Boats to torpedo the ships.

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15y ago

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