I don't have a specific example yet, but my assigned patrol area is pretty far out in the Atlantic so we'll see if I can actually find it
I was also wondering about what happens if I don't know exactly which 1x1 box I'm in, but you answered that, and it sounds like it doesn't matter. You will just get LOP lines that place you in the correct box.
But to better explain my thought process, say I have a DR position of 56 N 4 W for example, and I am in fact inside this 1x1 box. Because longitude increases in absolute value going west, I think my assumed position is the bottom right corner of the 1x1 box. So is the bottom right corner supposed to be the origin of the LOP transfer lines? Or do I say that my DR position is 56N 5 W which is the bottom left corner of the box?
I guess another way to ask it might be: does it matter which corner I start in?
I don't know if I'm making any sense here
