Delta Air Transport was formed in 1966 to operate air-taxi and charter services. Scheduled passenger services are operated linking Antwerp and Brussels with Amsterdam and Düsseldorf on behalf of KLM/NLM and Sabena. Charter flights to points in Europe and the Mediterranean area are also flown. Shares in Delta are currently held by Sotramat S.A. (17 per cent), KLM (33-7 per cent) and private interests (49-7 per cent).Head Office: B-2100 Antwerp, Deurne, Belgium.   Delta Air Transport NV  Until July 1976 Delta was a subsidiary of Companie Maritime Belge but this company's holding (66-6%) was acquired by the general aviation company Sotramat SA during that month. Remaining shareholding is held by KLM. Scheduled passenger services are operated linking Antwerp and Brussels with Amsterdam and Düsseldorf on behalf of KLM/NLM and Sabena. Charter flights to points in Europe and the Mediterranean area are also flown. Head Office: B-2100 Antwerp, Deurne, Belgium.   Executives: president, L. Feron; general manager, Tony van Grieken; chief pilot, Capt H. Leeman. Fleet: one DC-6B, four   Executives: general manager, Tony van Grieken. Fleet: five Fairchild FH-227.