The fit described as Penelope's August 1940 configuration included six 6-inch guns in three twin mountings, with later changes acknowledged for 1942. The secondary battery is described hesitantly as four 4-inch guns in two twin mountings. Light anti-aircraft weapons included two quadruple pom-poms, six 20 mm Oerlikons, and quadruple machine-gun mountings. Six 21-inch torpedo tubes were arranged in two triple launchers. The combination gave a small cruiser substantial armament, while the close-range anti-aircraft weapons raised a separate question about stopping power.
Chapter · 7:50-9:26
Penelope's guns and torpedo armament
The armament list combines six 6-inch guns with a secondary battery, several types of light anti-aircraft weapon, and two triple torpedo launchers.