Far Cry 3: Bow Scope measuring

So I have recently started running around with the bow equipped with the scope. When I am zoomed in, the markers indicate which point is aiming at what distance. I try to estimate the virtual distance and line up the corresponding marker in the scope but when I let go, the bolt falls embarrassingly short. So my question is: Are the measurements in feet or meters?

Solution 1:

From what I recall, the measurements are in meters.

As for the measurements, here is a good thread for tips on shooting with the bow: http://www.gamefaqs.com/boards/632849-far-cry-3/64795166

Here is an excerpt:

Place the 0 marker on their head, if the 100 marker stops at their feet they are 25 meters away.

Place the 50 marker on their head, if the 80 marker stops at their knee they are 50 meters away.

Place the 0 marker on their head, if the 50 marker stops at their knee they are 80 meters away.

Place the 0 marker on their head, if the 50 marker stops at their feet they are 100 meters away.