The event is, in part, meant to simulate the action of bird hunting. The shooter shoots from seven positions on a semicircle with a radius of 21 yards (19 m) and an eighth position halfway between stations 1 and 7. There are two houses that hold devices known as "traps" that launch the targets, one at each corner of the semicircle. The traps launch the targets to a point 15’ above ground and 18’ outside of station 8. One trap launches targets from 10’ above the ground ("high" house), and the other launches it from 3’ above ground ("low" house). At stations 1 and 2, the shooter shoots at single targets launched from the high house and then the low house, then shoots a double where the two targets are launched simultaneously. At stations 3, 4, and 5, the shooter shoots at single targets launched from the high house and then the low house. At stations 6 and 7, the shooter shoots at single targets launched from the high house and then the low house, then shoots a double. At station 8, the shooter shoots one high target and one low target. The shooter must re-shoot his first missed target or, if no targets are missed, must shoot his 25th shell at the low house at station 8. This 25th shot was once referred to as the shooter's option, as he was able to take it where he preferred. Now, to speed up rounds in competition, the shooter must shoot the low 8 twice for a perfect score.