A 1942 Office of Naval Intelligence report shows the class after Galatea's loss, when Arethusa, Penelope, and Aurora remained in service. Its drawing offers a compact wartime view rather than only the as-built specifications. The labelled features include the 6-inch battery, 4-inch anti-aircraft guns, and pom-pom mountings. Read alongside the earlier technical description of the First World War class, the guide also prevents the two Arethusa generations from being blurred together. It demonstrates how an intelligence manual supported recognition while summarising the gun roles of a small wartime cruiser.
Notable Point · 14:16-15:09
Reading an Arethusa's wartime armament from an ONI guide
A 1942 American intelligence drawing shows how the surviving Arethusas combined their 6-inch battery with 4-inch anti-aircraft guns and pom-poms.