face layer's brittleness was counterproductive against such impacts. Consequently, alongside face hardened armour such as KCA, homogeneous armour types that combined ductility and tensile strength were developed to protect against glancing impacts. Homogeneous armour was typically used for deck armour, which is subject to more high-obliquity impacts and, on some warships such as and battleships, for lower belt armour below the waterline to protect against shells that land short and dive underwater. Examples of such armour include German Wotan weich (Ww) and US special treatment steel (STS) and Class B homogeneous armour. References Bibliography Naval armour Krupp