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A navigational chart shows relevant data for the crew of any vessel on their travels, such as coastlines, facilities, ports, and more. These charts were once only available on paper, but now digital versions are widely used. Let’s explore what a nautical chart is and what information it provides.
What is a nautical chart?
More than just a maritime “road map”, nautical charts provide detailed information about sea areas, coastlines, ports, water depths, seabed features, navigational hazards, buoys, tides, and currents. They help sailors plan safe voyages and avoid restricted areas.
What sort of information do nautical charts provide?
- Positioning data: reticle, magnetic variation, radar range, and coordinates.
- Topography: coastlines, soundings, depths, seabed nature.
- Navigation aids: buoys, lighthouses, signals, pilot stations.
- Maritime communication: radio, radars, navigation stations.
- Traffic guidance: tracks, traffic lanes, anchorages.
- Regulatory info: customs, military zones, restricted areas.
Digital vs Paper Nautical Charts
Nautical charts exist in paper and electronic formats. The SOLAS Convention mandates all ships to have charts (paper or ECDIS). ECDIS requires backup systems and allows precise route plotting and monitoring.
Types of Electronic Nautical Charts
- Raster Navigational Charts (RNCs): Scanned images of paper charts. They mirror traditional layouts.
- Electronic Navigational Charts (ENCs): Vector-based, clickable charts that display dynamic data with updates and metadata.
Updating the Charts
Both RNCs and ENCs receive periodic updates. Updates are transmitted via satellite, radio, or internet downloads while at port. This ensures data is always current and safe for navigation.
Suisca Group provides comprehensive support for maritime navigation. We offer ADMIRALTY nautical charts through Representaciones & Charts, an approved UKHO distributor. Trust Suisca Group to supply, advise and support your navigation needs with over 30 years of experience.
