No. 3 Control and Reporting Unit (3CRU) is a Royal Australian Air Force

Royal Australian Air Force

The Royal Australian Air Force is the air force branch of the Australian Defence Force. The RAAF was formed in March 1921. It continues the traditions of the Australian Flying Corps , which was formed on 22 October 1912. The RAAF has taken part in many of the 20th century's major conflicts...

 surveillance unit. 3CRU is currently located at RAAF Base Williamtown

RAAF Base Williamtown

RAAF Base Williamtown is a Royal Australian Air Force base and headquarters to Australia's Tactical Fighter group. The base is located north of the coastal city of Newcastle, New South Wales in the Local Government Area of Port Stephens. The military base shares its runway facilities with...

 near Newcastle, New South Wales

Newcastle, New South Wales

The Newcastle metropolitan area is the second most populated area in the Australian state of New South Wales and includes most of the Newcastle and Lake Macquarie Local Government Areas...

 and is primarily responsible for conducting surveillance of the air-sea gap between Australia and its northern neighbours. Operating from the Eastern Region Operations Centre, known commonly as East ROC, 3CRU is the premier ADGE unit. A detachment of 3CRU, 3CRU DET TDL, operates from the Northern Region Operations Centre (North ROC) at RAAF Base Tindal

RAAF Base Tindal

RAAF Base Tindal is a Royal Australian Air Force air base located near the town of Katherine in the Northern Territory. The base is currently home to No...

and is currently being upgraded to the AIR5333 project Vigilaire.