 No. 5 OTU was re @-@ formed at Williamtown on 1 April 1970 to provide pilots with operational training prior to their conversion to the Dassault Mirage III fighter . The unit 's reactivation was celebrated with a dinner attended by its original commanding officer , B.F. Rose , and a flypast of forty @-@ nine aircraft from No. 2 Operational Conversion Unit ( OCU ) . No. 5 OTU was divided into instructional and operational flights , and conducted training in concert with Mirages from No. 2 OCU and No. 76 Squadron . Its aircraft also participated in joint exercises and display flights , including air shows celebrating the RAAF 's 1971 golden jubilee . The unit was equipped with forty CAC Sabre jet fighters , some de Havilland Vampire jet trainers , and eight Macchi MB @-@ 326s previously operated by No. 2 OCU for lead @-@ in fighter training . Vampire operations began winding down in September 1970 , and the type was withdrawn in April 1971 . 
