BB-56 in June of 1942, as the ship sortied with the Royal Navy in the Atlantic. Note the drastic increase in anti-aircraft guns since the shakedown. The 1.1" quads have been fitted, with the guns directed by the Mk.44 gun director (an early predecessor of the Mk.51, with no capability for lead angle computation). Large, prominent wind deflectors have been added to the air defense level - a feature characteristic of BB-56. A TBS (Talk-Between-Ships) antenna is mounted ahead of the air defense level. Fire control radars have been added to the Mk.38 main battery directors (Mk.3 Mod.1 "FC" radars in this case), and Mk.4 radars have been mounted on all the Mk.37 5" directors except for Sky Four (the aft director). The CXAM-1 air search radar sits above the fire control tower.
Most interesting is the large bracing on the aft director towers as well as the forward Mk.37 director's foundation. As mentioned before, this was due to vibration problems. The bracing on BB-56 is much more substantial than that on BB-55.
The ship wore Measure 12 Modified during this period (the famous splotch camouflage on most early USN fleet units), but would soon repaint into the Measure 22 graded system camouflage it would wear for the rest of its service life.
More iterations to come as I find time.
Mk.44 director available
here in the top right corner...