||United Kingdom Hydrographic Office
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The latest sixth edition of the Nautical Publication NP5011 released by UKHO. Traditionally, the book consists of five chapters covering General Information - navigation chart no., title and marginal notes, positions and distances, directions and compass; Topography - natural cand cultural features, landmarks and ports; Hydrography - tides and currents, obstructions and offshore installations, tracks and routes, areas and limits; Aids to Navigation & Services - lights, fog signals, buoys and eacons, radar, radio and sat navigation systems, services, small craft facilities. the last chapter contains abbreviations of principal non-English and English terms.