Surface Patterns Reveal Water Depth
Whenever waves meet shallow water, the patterns change. We can use these new patterns as clues to the depth of water. It doesn’t matter the…
Tag: chart
The Effect of Air Pressure on Tide Heights
High air pressure leads to lower than expected tides. The opposite is also true: low air pressure leads to higher than expected tides. We can…
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…
Water Reading Courses in the Maldives
I have just returned from an extraordinary visit to the Soneva Fushi resort in the Baa Atoll region of the Maldives. I was there to…
How to Read Wave Patterns at the Coast
I took this photo from the South West Coast Path in the Isle of Purbeck, Dorset, a few days ago. In it we can see…
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…
RNLI Navigation
My thanks to the RNLI, who gave me the opportunity of going to sea with them this afternoon. They were also kind enough to let…