@ ToniloCoyote : yes, for the ships that have 0 at their .sims the
"The object's Draught [m]. If 0, Then it is taken from the object's global position."
is the answer to what must be done. with some method must count the distance between the origin node of ship's hull ( coordinates for this node are always 0,0,0) and its keel . i can tell you how i did it for sh3 but the programm i used is not working with sh5 .the programm is called misfit (thanks to Privateer ). with misfit it is a piece of cake to take these measurments ...i know that this is not so helpful for sh5 but what i am saying is that this distance must be measured.
@ Trevally :
you are going just fine ! just make your '10' at vertical scale to match EXACTLY with 5,71 (not close to it...make it to match exactly) and then MAKE THE HORIZONTAL TO BE EXACTLY THE SAME WITH THE VERTICAL SCALE.
about your last pic: i see that the tool is now working great ! why i am saying this? becuase ,i hope that you understand that if your true range to target was 1030m (and not 1000) the tool will show the correct aob ...right ?
have in mind this: at aob(s) close to 90....the degrees are very close each other (damn...english are not helping me here) so just a slight 'wrong' more or less at inner ring's rotation will be some(or many) degrees off ....and ,also ,add to this some light inaccuracies for the tool itself and you will understand that your tool is going now...just fine !
the aob rings are more usefull for angles not close to 90 degrees (see the space between 25 to 30 degrees and compare it with the space between 80 to 85 degrees).
but ,most of all ,i believe that at your example (last pic you showed) it was your true range to target that causes this,i am saying it again, light 'mistake' on aob rings.
i run the test mission and here is what i got (i have given the correct value to mast at ship's cfg e.g 47,92 and i used the stadimeter to get the range .note: i used the higher zoom when i used the stadimeter in order to get the more precise ,as possible, range reading.then i switched to minimum zoom and the rest is at the following pic) :
