I'm not seeing it. What did you notice?
The larger of the turret is a odd number in the base is an even number so, if the base is a perfect circle, the drawing doesn't fit the reality. For another example, if you take a front view of the turret, one side of the turret itself will be larger, by one pixel, that the other side...
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WW2 Iowa class (Top views)
USS Midway CVB-41