The AA fit changed considerably on all the USN surface combatants throughout the years (but especially on the BB-55 class...) so I wouldn't expect to get it absolutely "perfect"... each refit added and subtracted various guns in different places.
I fully agree for the "perfect",
BUT:
Despite numerous modifications AA, we can draw some
MAJOR PERIODS, for the North-Carolina BB's such as:
- as comissionned (
spring 1941), whithout radar & with 4 quadruples 1,1" AA, a dozens of 0,5" MGs
- by
february/september 1942, with radars, camo, & numerous 20mm guns.
- maybe during mid 1943 ?
-
mid 1944 refit
-
postwar (1946), training-ship (with less AA guns)