The Colour and Shape of Navigation Marks
Most navigators, even inexperienced ones, learn that colours are important when trying to identify navigation marks at sea. And most people also know that there…
Tag: colours on a chart
What is a ‘Drying Height’ on a Chart?
The definition of a drying height: “The drying height is the vertical distance of the seabed that is exposed by the tide, above the sea water level at the lowest astronomical tide.” But this…
The Colour of the Sea as a Map
For thousands of years, sailors have used the colour of the sea to help them make sense of the waters they travelled through. In many…