OREANDA-NEWS. A.M. Best has affirmed the financial strength rating of A (Excellent) and the issuer credit ratings of “a” of Delvag Luftfahrtversicherungs-AG (Delvag) and its subsidiary, Delvag Rueckversicherungs-AG (Delvag Rueck) (both domiciled in Germany). The outlook for each of the ratings remains stable.