Abbreviation Relevant to Gunners

AT Anti-Tank. ATACMS Army Tactical Missile System. ATD Army Training Directive. ATGW Anti-Tank Guided Weapon. ATI Artillery Target Indication. ATk Anti-Tank. At Priority Call An artillery control authority introduced after WW2 lasting until 1990s. ATT Annual Test of Training. AU Aiming Unit (Part of the Javelin/HVM shoulder launched system) ................
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