 These were equipped with bomb racks that had been fitted to carry up to 1,000 kilograms of fragmentation and anti-personnel bombs.Transport, training, and surveying functions were carried out by a variety of Cessna and de Havilland aircraft.In 1987 during the Vadamarachchi Operation the air force mustered one HS 748, two Y-12s and one de Havilland Heron, all configured as improvised bombers.