Just looking at this on face value, the following scenario could be considered
So for X turret we would consider [irrespective of Port or Stdb]
Train
0 degrees to 60 degrees of Train = Pointing Zone, Non Firing Zone - 60 degrees to 130 degrees of Train = Pointing/Firing Zone
Elevation
0 degrees to 60 degrees of Train = Non Pointing Zone, Non Firing Zone - 60 degrees to 130 degrees of Train = -3/+40 degree of elevation, Pointing/Firing Zone
PS.....
1. I am not sure what significance Note 5 is about
2. Colin, reading the word Critical, I would read it as an expression or word for a degree of elevation or train that is outside the permissibles referenced as Pointing/non Pointing or and Firing/Non Firing zones
3. We must also remember vessels of this exact vintage had no automatic ordnance trajectory compensation for any change in the vessels direction, speed, heel, roll or yaw etc
Derek