Tidal Stream Diamond
Symbol printed in purple ink, starting with “A” and continuing alphabetically with geographical location in Latitude and Longitude
Somewhere on the chart, generally on land will be a tidal diamond table.
This contain a grid of 13 row and three columns of each diamond
The rows are the hours of tidal cycle showing 6 hours before high water and after 6 hours high water
First column show the direction of streams in degree
Second and third columns show the rate(speed)in knots during spring tide and
neap tide
