Keywords: Operational Navigation Chart B-4, 4th edition.jpg en 1 1 000 000 scale Operational Navigation Chart Sheet B-4 4th edition Covers U S S R Lambert Conformal Conic Projection Standard Parallels 73 20N and 78 40N Center longitude 137 15E 1976-02 txu-pclmaps-oclc-8322829_b_4 jpg onc/ Defense Mapping Agency Aerospace Center St Louis Air Force Station Mo Covers 72N to 80N 118E to 156E PD-USGov Uploaded with UploadWizard Operational Navigation Chart Old maps of USSR Maps of the Arctic Ocean Maps with Lambert conformal conic projection JPG maps Operational Navigation Charts in the Perry-CastaƱeda Library ONCs uploaded by Revent Maps of the Laptev Sea Maps of the East Siberian Sea New Siberian Islands 1976 maps |