Sorry. I meant “aft of the island.”
Remember the original design of the Lex was as a world-class (faster, heavier, larger cannon) battlecruiser? (It was arranged below decks like its contemporary battle cruisers (HMS Hood for example) with multiple stacks and widely spaced furnaces and boiler rooms. So the original designers expected lots of room topside between the gun turrets and the fire control masts (no radar then!) for lots of smokestacks, boat cranes, turrets - but no anti-air guns.
When they changed it to a high-speed carrier, they re-routed all the exhaust stack piping into one huge stack to the starboard side. After a few years use, the aviation community found that very large stacks like that caused a lot of air turbulence behind and around the stack, and changed to a side-discharge style with very little turbulence.
But, as one of the first-ever carriers, and one with no catapults and only needing to launch biplanes only slightly faster than the ship itself, this wasn’t too bad a start.
Guns and Gun Directors