Naval Station Great Lakes (NAVSTA Great Lakes) is the home of the United States Navy's only current boot camp, located near North Chicago, in Lake County, Illinois. Important tenant commands include the Recruit Training Command, Training Support Center and Navy Recruiting District Chicago. Naval Station Great Lakes is the largest military installation in Illinois and the largest training station in the Navy. The base has 1,153 buildings situated on and has of roadway to provide access to the base's facilities. Within the naval service, it has several different nicknames, including "The Quarterdeck of the Navy", or the more derogatory "Great Mistakes". It is also referred to as "second boot camp" while at Training Support Command. The original 39 buildings built between 1905 and 1911 were designed by Jarvis Hunt. The base functions similarly to a small city, with its own fire department, Naval Security Forces (Police), and public works department. One of the landmarks of the area is Building 1, also known as the clocktower building. Completed in 1911, the building is made of red brick, and has a tower over the third floor of the building. The large parade ground in front of the administration building is named Ross Field. Major tenant commands Recruit Training Command In 1996, RTC Great Lakes became the Navy's only basic training facility. The Base Realignment and Closure Commission of 1993 resulted in the closure of Naval Training Center San Diego, California and Naval Training Center Orlando, Florida, their associated Recruit Training Commands, and the consolidation of US Navy enlisted recruit training to Great Lakes. Approximately 40,000 recruits pass through Recruit Training Command annually with an estimated 7,000 recruits on board the installation at any time. RTC Great Lakes has been active for over 100 years. Training Support Center TSC Great Lakes is the Navy's premier technical training command. It has an annual throughput of 16,000 Sailors a year. TSC supports the following six learning sites: Surface Combat Systems Training Command (SCSTC) Surface Warfare Officers School Command Unit (SWOSU) Center for EOD and Dive (CNEODD) Center for Naval Leadership (CNL) Center for Personal Development (CPD) Center for Service Support (CSS) The following rating training class A-schools are located at Naval Station Great Lakes: Electrician's Mate (EM) Electronics Technician (ET) Fire Controlman (FC) Gunner's Mate (GM) Interior Communications Electrician (IC) Boatswain's Mate (BM) Operations Specialist (OS) Hull Maintenance Technician (HT) Damage Controlman (DC) Engineman (EN)