The Emerald Class is a Light Cruiser historically, but although considered Light Cruiser in-game, they can have 9.2" Cannons. Which, under the Washington Naval Treaty, restricts 8 inchers and up, but 6 inchers and down are Light Cruisers.
Max Displacement: 9435
Minimum Displacement: 2330
Main Battery Slots: 7
Secondary Battery Slots: 5
Torpedoes: 4 (in part with Secondary battery)
Depth Charges: 1 (in part with Secondary battery)
Affiliation: His Majesty's Navy, Royal British Navy.
Class: Heavy Cruiser (?)/ Light Cruiser