Excellent, and necessary, question C-3PO. However
I do not yet have a set of plans, so your impressions from your diagram will be as good as mine.
You have numbered the turrets A to G, with A aft-most. They were numbered 1 to 7, staring from the bow. For the purpose of this I will use your annotation, and give degrees either side of the normal park position.
Note: 0' park positions foreward for G, F, E, C. Aft for D, B, A. A, b & D rotate opposite to G, F, E, C
G: training +/- 150 . No firing, directly ahead, say +/- 20, and beyond +/- 140
F: training +/- 150. No firing over hood below +/- 30, and beyond +/- 140.
E: training between 25 and 150 either side. No firing 10 inside this either side.
D: training between 30 and 150 either side. No firing 10 inside this either side.
C: training between 25 and 150 either side. No firing 10 inside this either side
B: training +/- 150. No firing over hood below +/- 30, and beyond +/- 140.
A: training +/- 150 . No firing, directly astern, say +/- 20, and beyond +/- 140
Mostly guesswork I admit, but hopefully a starting point