Royal Observer Corps
The Royal Observer Corps (ROC) was a civil defence organisation intended for the visual detection, identification, tracking and reporting of aircraft over Great Britain. It operated in the United Kingdom between 29 October 1925 and 31 December 1995, when the Corps' civilian volunteers were stood down. (ROC headquarters staff at RAF Bentley Priory stood down on 31 March 1996). Composed mainly of civilian spare-time volunteers, ROC personnel wore a Royal Air Force (RAF) style uniform and latterly came under the administrative control of RAF Strike Command and the operational control of the Home Office. Civilian volunteers were trained and administered by a small cadre of professional full-time officers under the command of the Commandant Royal Observer Corps; latterly a serving RAF Air Commodore.
Royal Observer Corps
In 1950, King George Vl granted permission for the issue of a "Royal Observer Corps Medal" for twelve years continuous service. Each subsequent period of twelve years was recognised by the award of an RAF "eagle clasp" attached to the medal ribbon. Service by full-time officers was calculated at a rate of 50% for qualifying years, thereby requiring fully twenty four years service in order to qualify for a medal or subsequent clasp. However, any spare-time service previously undertaken by such individuals counted in full. (ROC personnel who served for 28 days during World War II also qualified for the award of a War Medal, with service of 1,080 days qualifying for the 1939–1945 Star and the Defence Medal).