 A "hot-crew" composed of an NCOIC (usually a Sergeant) and one or more additional launcher crew members is on-hand to repair or refuel launching stations, and a reload crew is on standby to replace spent canisters after missiles are launched.The ICC crew is similar to the ECS crew at the battery level, except its operators are designated as the Tactical Director (TD) and the Tactical Director Assistant (TDA).Patriot battalions prefer to operate in a centralized fashion, with the ICC controlling the launches of all of its subordinate launching batteries through the secure UHF PADIL communications network.