the archer can locate and mark the points of elevation on thissight. When he steps up to the shooting line, all he has to dois to set the carriage on the mark indicated for the distanceof the target.
There are sights with glass prisms attached to the sightingbar; these are used on bows with points of aim above thetarget. With the prism sight, the archer sees the image of thetarget which appears to be in the line of sight but, in reality,is much under it. This is much better than depending onsome uncertain hill or tree for a point of aim.
The sighting bar extends beyond the bow to the left sothat it can be plainly seen. This location is above the arrowrest from 1/2 inch to 3 or more inches, depending on the rangeof the target. The archer uses this sighting bar as a frontsight, holding it on the center of the target when he aims.