Exploring Different Types of Navigational Charts
There are many types of navigational charts—important tools for sailors—containing critical details for safe navigation across oceans, seas, lakes and rivers. These charts are carefully produced by the relevant hydrographic offices around the world to provide a detailed picture of what lies under water, including water depths and potential obstructions like reefs, shoals and wrecks.
Navigational charts detail features ranging from beaches to cliffs, as well as structures like lighthouses, buoys and beacons for safe navigation.
Different Types of Nautical Charts
When at sea, sailors use several different scales of navigational charts to plan the safest routes and find the best course of travel. Each chart is detailed that guides the sailor through the waters, allowing them to plan for any potential hazards and estimate the amount of time they will spend at sea.
Nautical charts, which can now be accessed digitally, have become significantly more accurate thanks to advancements in satellite technology. Let’s take a look at a few different types of navigational charts.
Electronic navigational charts are digital charts used in conjunction with electronic navigation systems.
Raster navigational charts are digital versions of paper charts designed for online systems.
Paper charts are traditional navigation charts used as backups or in areas where there is no electronic coverage.
Planning charts are large maps designed for trip planning rather than navigation.
Tidal charts display tides and currents, allowing you to plan your trip accordingly.
Ice charts show the current ice conditions in areas with ice to help you avoid hazards.
Coastal charts are detailed maps of coastlines used for safe navigation.
Harbour charts are maps of ports and harbours that show docks and facilities.
The Evolution of Nautical Charts
From old stone tablets to digital formats, nautical charts have transformed drastically over the years. The earliest maps were based on careful observations made by sailors out at sea, but mediaeval portolan charts revolutionised navigation in the 13th century by detailing the Mediterranean and Black Sea coastlines.
Further findings were made during the Age of Exploration, and today’s GPS and electronic navigational charts offer accuracy for safer navigation and exploration.
We’re Australia’s largest marine chart agent, committed to inspiring commercial and recreational sea exploration. Check out our bookshop to learn more about how mariners strategically leverage different types of navigational charts for safe exploration.
