▁role ▁of ▁sust aining ▁the ▁Dist ant ▁Early ▁Warning ▁Line ▁( DE W ), ▁supported ▁the ▁occas ional ▁military ▁exercise ▁or ▁scientific ▁expedition , ▁and ▁was ▁a ▁key ▁stop over ▁on ▁the ▁North ▁Atlantic ▁fer ry ▁route . ▁ ▁Through ▁the ▁ 1 9 6 0 s , ▁Nord air ▁was ▁the ▁main ▁air line ▁serving ▁F rob isher ▁Bay ▁from ▁Montreal , ▁ ▁to ▁the ▁south . ▁Douglas ▁DC - 4 s ▁operated ▁into ▁the ▁ 1 9 7 0 s ▁and ▁Lock he ed ▁Super ▁Const ell ations ▁between ▁ 1 9 6 4 ▁and ▁ 1 9 6 9 . ▁In ▁ 1 9 6 8 ▁Nord air ▁introduced ▁the ▁Bo eing ▁ 7 3 7 - 2 0 0 ▁on ▁the ▁F rob isher ▁Bay ▁run . ▁At ▁the ▁same ▁time , ▁Brad ley ▁Air ▁Services ▁had ▁been ▁expand ing . ▁By ▁the ▁ 1 9 7 0 s , ▁the ▁company ' s ▁fleet ▁of ▁de ▁Hav ill and ▁Canada ▁D HC - 6 ▁T win ▁Ot ters ▁and ▁Douglas ▁DC - 3 s ▁was ▁serving ▁many ▁small ▁Ar ctic ▁communities ▁from ▁Y FB , ▁carrying ▁passengers , ▁mail , ▁gro cer ies , ▁and ▁other ▁ess entials . ▁Brad ley ▁became ▁known ▁as ▁First ▁Air ▁in ▁ 1 9 7 3 ▁and ▁soon ▁added ▁B A e ▁ 7 4 8 s . ▁ ▁In ▁the ▁ 1 9 8 0 s , ▁Canada ' s ▁air line ▁industry ▁was ▁in ▁transition , ▁with ▁Air ▁Canada ▁and