August, 1941 during the shakedown cruise. One of the books I have lists "12" .50-caliber machine guns fitted during the shakedown, but as I can't locate them in any photographs (all save for one), I've chosen not to display them - if anyone has any idea where they might be located, please let me know.
The ship's November 1941 refit significantly increased the ship's AA fit - adding many more .50-caliber machine guns and 20mm Oerlikons. That same refit also added the large bracing to the aft Mk.38 director tower in an attempt to reduce vibration. Note lack of sky lookouts and target designators at the air defense level - these would be added in 1942.
Usefull for a november 1941- mid february 1942 version
Almost no 20mm added & only few additionnal 0,5" MGs added
North Carolina by late february 1942
North Carolina by march 1942
North Carolina, 17 april 1942
Washington, 14 may 1942
This is the ship as it appeared in June of 1942. Note the massive increase in anti-aircraft guns, as well as the addition of fire control radars on the Mk.38 main battery directors (carrying Mark 3 Mod. 1 sets), and Mark 4 sets on the Mk.37 directors (all except the aft director, which won't receive its Mark 4 until 1943). Note the removal of the Mk.35 navigational rangefinders and their (probably prudent) replacement with 20mm Oerlikon cannons. The ship has received more whip antennas and life rafts, among others.I think I've finally found a Measure 12 modified color scheme that actually works - taken from the Wikipedia USN camouflage page.
North Carolina, 03 june 1942
Washington, 21 august 1942