Hi,

i have a question about course offset calculation.
I don't have the rulebook near me (i'm at work ), so i will quote approximatively.
The rule say we need to count the number of windows between the crossing vector and the target bearing. Diagonals count as 1.
But, do have i to count with the vertical component ?

ex :
My crossing vector is, say 8 in A-, and my target bearing B/C+
If i simply count windows, it make 3 : from A- to A/B- (1), then B- (2) and finally B/C- (3). It's overlap with my target bearing.
But, with the vertical component, it makes A+ to A (1), then to A/B- in diagonal (2), then B- (3) then B/C (4) which is really better.

I think the second method is the right one but not sure.

Thanks,

Yes, the vertical component is included, so your second method is the correct one.

thanks guy !

Looking at your original post again, I must clarify.

The AVID represents the surface of a sphere, divided into 50 spaces. When you compute the course offset, you need to determine the length of a path on the sphere between the crossing vector window and the target bearing window, which, unless both windows are on the outer yellow ring, will necessarily involve a vertical component.

For the example you gave, with crossing vector in A- and target bearing in B/C+, the path would go from A- to A/B to B to B/C+, for a course offset value of 3.

Thanks, i think that i understand better now.

To add something to my previous reply on this, since I am looking at this issue for a different reason ... although you can use diagonal transitions when counting the distance between windows on the AVID, you aren't required to, and since we "round in favor of the attacker" and the attacker usually wants the course offset to be as high as possible, then for a CV direction of A- and bearing in B/C+ one could go A- to A to A+ to A/B+ to B+ to B/C+, for a CO of 5. (I figure the general principle is, you don't have to use diagonal transitions when determining the CO, but you have to produce the smallest value possible while using only orthogonal transitions.)