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OpenCPN (Open Chart Plotter Navigator) is a free software maritime chart plotter and navigation software for use underway or as a planning tool. Developed by a team of active sailors and tested in real world conditions, it has multiple supported chart formats and a variety of data inputs.
Garmin BaseCamp is a map viewing / GIS software package offered free for download by Garmin, primarily intended for use with their GPS navigation devices. BaseCamp serves as a replacement to the now unsupported Garmin MapSource.
On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.
Nautical publications is a technical term used in maritime circles describing a set of publications, either published by national governments or by commercial and professional organisations, for use in safe navigation of ships, boats, and similar vessels.
Responsible for updating nautical charts, surveying the seafloor, responding to maritime emergencies, and searching for underwater obstructions that pose a danger to navigation, the Office of Coast Survey provides the United States with navigation products and information for improving commerce and security and for protecting coastal environments. [1]
The raster file also contains data that is Geo-referencing; enabling computer based navigation attached to a GPS to locate and display the chart. The charts are stored in BSB format. "[The BSB file format] is a proprietary format of BSB Electronic Charts, LLP (bought by MapTech, Inc.)."
Various charts and pilot books for North American waters were published in England beginning in 1671, but the first book of sailing directions, charts, and other information for mariners in North American waters published in North America was the American Coast Pilot, first produced by Edmund M. Blunt in Newburyport, Massachusetts, in 1796.
BN Hydrographic & Oceanographic Center (BNHOC) is an agency for producing, procuring and distributing navigational charts, publications, Electronics Navigational Charts(ENC), BN Tide Table, BN BM Book to BN ships and establishments as well as maintenance of hydrographic, oceanographic, cartographic, meteorological and data processing instrument/equipment. [1]