 By 1966 , Braathens SAFE had sold all its DC @-@ 4s , and had purchased eight F @-@ 27s . The DC @-@ 6s were used exclusively for charter , with all domestic flights being flown with the F @-@ 27s . The same year , the booking system was centralized and moved to offices in Oslo . The company established sales offices in Bodø and Tromsø on 1 March 1967 . A new cargo department was opened at Oslo Airport on 29 September . Braathens SAFE applied in a joint venture with the Norwegian America Line to start a cargo flight to the United States and the Far East , but this was declined by the ministry . From 1967 , also DC @-@ 6s were used on domestic routes . In August , it was announced that Braathens SAFE would replace the F @-@ 27s with six new Fokker F @-@ 28 , and that the F @-@ 27s would be sold to the manufacturer . Later , the number of orders of 737s was reduced to two , and of F @-@ 28s to five . The <unk> cost NOK 40 million each . 
