The ONC is the standard worldwide small-scale aeronautical chart series, and contains cartographic data with an aeronautical overprint depicting obstructions, aerodromes, special use airspace, navigational aids, Maximum Elevation Figures (MEFs), and related data.

PRODUCT SPECIFICATIONS: MIL-O-89102(NIMA)DATA DENSITY/SCALE: 1:1,000,000COORDINATE REFERENCE SYSTEM: Lambert Conformal Conic 80?S to 80?N latitudes; Polar Stereographic elsewhereCONTENT: Because of scale, some features, including obstructions, are generalized in developed regions (only the highest obstruction within ticked area or urban quadrant is shown). A Military Grid is overprinted for interoperability, especially in regions of no Tactical Pilotage Chart (TPC) coverage. MEDIA: Large sheet (105.7cm by 146.1cm) aeronautical chart AREA COVERAGE: All navigationally significant land masses worldwideAPPLICATIONS: Designed for medium altitude (2000 to 25,000 feet above ground level) high-speed visual and radar navigation. Also used for mission planning/analysis and intelligence briefings, and are source for navigational filmstrips, special purpose, and cockpit/visual display products. In the absence of TPCs, ONCs also satisfy enroute visual and radar navigation requirements for low altitude operations.

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