Calculating times and heights of high and low waters at secondary ports
For the time and height of tides at secondary ports you will need to apply the time differences tabulated in the secondary ports table, to the daily predictions for the designated standard port.
You'll find detailed instructions in the document 'Method to find times or heights between high and low waters'.
Calculating times or heights between high and low waters at any port
Times and heights between high and low waters at standard and secondary ports can be calculated by using the method described in the printable documents below.