"brough", under constant and intensive training throughout the war expended 4,050 rounds of 50 cal., 15,180 rounds of 40 mm, and 25,093 rounds of 20 mm—all for practice. during anti-submarine actions, 200 depth charges and 372 projectiles were fired. when "brough" was commissioned her armament included torpedo tubes, eight 20mm guns, a twin 40 mm and three 3"/5o cal. guns. but as the pattern of warfare shifted from surface to air actions, repeated alterations resulted in the removal of the torpedoes, and the addition of another twin and a quad 40 mm, along with two more 20 mm.