The datapoints give a straight line from the corner where the deckhouse juts in (triangular locker) going aft and another straight line (running parallel to the centerline) going from the corner near the refueling kingpost extending forward.
Those two lines intersect at the location marked with the blue line (which happens to be the location of a data point at FR119).
Either there is a knuckle at this location or the data is incorrect (which I suspected). The question then become what IS correct? It is possible that the deckhouse was cut back to make room for boats during the 80's?
Here is the same general area (moved the view back) showing how the Floating Drydock plan covers it. The side of the deckhouse forward of the aft/maindeck 5" mounting moves in a foot from the side aft of the mounting. That would push the knuckle forward.
On the other hand, the booklet of general plans qualitatively indicates that this segment is continuous between the two gun mounts. That would make the sides below the phalanx mount angled (which they do not appear to be).
And the Floating Drydock planbook (WWII era) does not show this indentation in the deckhouse. AND, it shows a knuckle approximately at FR119. This image is of the port side. Sorry for the confusion of switching sides but the segmented image has the frame locations more clearly marked on the port side. To this image I have added my own gray line so show the knuckle on the plan.
If anyone has some plans giving offsets from the centerline of this area it would be helpful to figure all this out.
This is the problem of making everything fit in 3D. There are huge internal inconsistencies in the various plans when you try to fit them all together.