Safety is of paramount importance in the sport of paintball, and keeping markers shooting paintballs at a safe speed is an essential part of paintball safety. All fields and tournaments have limits on maximum paintball speed, and these guidelines need to be followed by recreation players playing in unsupervised areas. Tournaments and fields have check-in stations where markers are chronographed for paintball speed before play. However, markers can "get out of tune" during play and exceed paintball speed limits.