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How to add a disappearing target to IPSC match?
9.4.4 Each miss will be penalized minus 10 points, except in the case of disappearing targets (see Rule 9.9.2)
9.9.2 Moving Target Compliance
Moving targets which do not comply with the above criteria are disappearing and will not incur failure to engage or miss penalties unless a competitor fails to activate the mechanism which initiates the target movement before or when firing his last shot for that course of fire.