How did the q-ship get its name?

The term "q-ship" originates from the British Royal Navy during World War I, where the letter "Q" was used to designate certain merchant vessels that were armed for combat. These ships were disguised as ordinary merchant vessels to lure enemy submarines into attacking, allowing them to reveal their weaponry and engage in battle. The tactic aimed to surprise and destroy submarines while also protecting vital supply lines. The name reflects their dual purpose as both a merchant and a combat vessel.