HOW DO YOU MEASURE SD?

[Saber]

Can any one telll me how to measure the SD

on the creed web site it told me the formula and the wind and stuff
but it never told us how to measure the distance

it mentiond that to split in 30 sector but its also hard to find the exact
distance for the formula...
is there any trick to this ?

[mezzee]

you could take a screenshot and then split it in 30 parts in paint and print it, so you can use that as some kind of ruler