防空識別區
In late 1963 and into 1964, the Indonesian Air Force took to "buzzing" towns in Sarawak. This led to Malaysia declaring an Air Defense Identification Zone on 24 February. The RAF started periodic fighter patrols along the border using aircraft such as Javelin and RN Sea Vixens from the fleet carrier in theatre The UK already had 12 Light Air Defence Regiment Royal Artillery (12 Lt AD Regt) stationed in West Malaysia.