As it was, Yi Sun-Sin, who was largely cut off from government supplies throughout his campaigns, found the small amount of fifty pounds of iron worth mentioning in his war diary. Therefore, Hawley believes that it is unlikely that Admiral Yi would have passed in silence over the estimated six tons (twelve thousand pounds) of iron necessary for even a single outfit. Such a large amount of iron was equivalent to one ship's entire ordnance, and would have probably been considered more useful for casting additional cannons, particularly since the Koreans were well aware that Japanese warships were practically devoid of naval guns. Confronted with a Japanese enemy who relied on small arms fire and boarding tactics, and faced by the logistical and financial difficulties involved in acquiring such a large amount of iron, any iron cladding of the Korean vessels has been deemed by Hawley inherently superfluous: