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A nautical chart or hydrographic chart is a graphic representation of a sea region or water body and adjacent coasts or banks. Depending on the scale of the chart, it may show depths of water ( bathymetry) and heights of land ( topography ), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and ...
OpenSeaMap is a software project collecting freely usable nautical information and geospatial data to create a worldwide nautical chart. This chart is available on the OpenSeaMap website, and can also be downloaded for use as an electronic chart for offline applications. [ 1] The project is part of OpenStreetMap.
An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...
Portolan charts are nautical charts, first made in the 13th century in the Mediterranean basin and later expanded to include other regions. The word portolan comes from the Italian portolano, meaning "related to ports or harbors ", and which since at least the 17th century designates "a collection of sailing directions".
118 posts. 9 reviews. 6 helpful votes. Tidal and Nautical Charts. 3 years ago. We'll be in Exuma in two weeks and have rented a boat to get around Elizabeth Harbor. I'll have my phone and a data plan but no computers/wifi/etc. Has anyone purchased nautical charts around the harbor that are reliable enough to keep me out of trouble (especially ...
Website. opencpn .org. OpenCPN ( Open C hart P lotter N avigator) 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. [3] [4]
The numbers in the squares indicate the individual Planning Guidecoverage areas. Sailing Directionsare written directions that describe the routes to be taken by boats and ships during coastal navigation and port approaches. There are also products known as Sailing Directions, which are books written by various Hydrographic Offices throughout ...
The United States Hydrographic Office ( USHO) prepared and published maps, charts, and nautical books required in navigation . The office was established by an act of 21 June 1866 as part of the Bureau of Navigation, Department of the Navy . It was transferred to the Department of Defense on 10 August 1949. The office was abolished on 10 July ...
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