The numbers are confusing because the Bundeswehr doesn’t measure the operational readiness of various weapons systems relative to the numbers it has on its books, but relative to the "available inventory." That number is always much lower given that a significant number of vehicles and weapons systems are, at any given time, undergoing refurbishment. For example, the books show that the Bundeswehr possesses more than 300 Leopard 2 battle tanks. Around two-thirds of them are "available," but of that number, just 60 percent – around 130 – are operational.