ONC charts are being removed from public sale by NGA in 2010. In February of 2010, NGA is removing ONC and TPC charts from public sale. These charts are rapidly "going out of print" as current inventory is sold out and are not reprinted. If you want ONC or TPC charts, stock up now!
JOG (Joint Operational Graphic), TPC (Tactical Pilotage Chart), ONC (Operational Navigation Chart) Charts for the World. JOG - 1:250,000; TPC - 1:500,000; ONC - 1:1,000,000. DMA/NIMA/NGA.
These well-known charts are topographic maps with aeronautical information overlain. For many countries, the TPC and ONC charts offer the only topographic maps readily available on a
sheet-by-sheet basis, especially in English. We stock all of the 1:500,000 TPC charts and selected ONC (1:1,000,000) charts. Remember that the TPC charts are numbered like B-02C and the ONC charts
are B-02. The two 8" x 8" sample images cover the same area (northwest of Seoul, South Korea) so that you can see the difference in the level of detail between the two series. Indonesia uses the World Aeronautical Chart grid system rather than the ONC grid system, thus they are listed separately below.