The Royal Thai Armed Forces Headquarters (Thai: กองบัญชาการกองทัพไทย) or the RTARF HQ, is the "mostly ornamental" joint headquarters of the Royal Thai Armed Forces, which is composed of the Royal Thai Army, the Royal Thai Navy and Royal Thai Marine Corps, and the Royal Thai Air Force. Formerly the Supreme Command Headquarters (Thai: กองบัญชาการทหารสูงสุด), the name was changed in February 2008. The headquarters is divided into two branches: the "Command Group" and the "Joint Group". The headquarters is headed by the Chief of Defence Forces (Thai: ผู้บัญชาการทหารสูงสุด), currently General Sommai Kaotira of the Royal Thai Army. The chief is supported by several departments and directorates, including four deputy chiefs. The headquarters is under the responsibility of the Ministry of Defence