Q&A: why Queen Elizabeth carriers have two islands

Why do the Queen Elizabeth-class carriers use two separate islands?

Two exhaust stacks already divide the available space, and separate islands improve lift, hangar, ship-control, and flight-deck arrangements while operational command remains centred in the CIC.

The second island was not created simply to keep the ship commander and air commander apart. The carrier has two exhaust stacks, so each stack already creates a block of unusable flight-deck and hangar volume. Building separate islands around them avoids one very large obstruction and helps position the aircraft lifts and hangar spaces more effectively. The forward island supports conning the ship, while the aft island is arranged for flight-deck control. Senior operational command normally works from the combat information centre, so the visible islands do not map neatly onto the complete command hierarchy. Machinery routing, aviation flow, and command functions combine in carrier architecture.