1971/09 - Air Defence System Division

The Air Defence Systems Division (ADSD) was formed in June 1995 and played a critical role in managing Singapore's airspace. It also provided a comprehensive air defence shield with various Ground Based Air Defence weapon systems, long-range sensors, Airborne Early Warning aircraft, and air defence fighter aircraft. The ADSD had a headquarters and three brigades: the Air Defence Brigade, Air Force Systems Brigade, and Divisional Air Defence Artillery Brigade.

The Air Defence Systems Division crest.