The persistence product uses the daily maximum significant wave height (Hs) recorded each day of the selected time span, and tabulates the occurrences of the number of consecutive days the maximum Hs is less than a given height.
For example if the maximum daily Hs is the following:
then the tabulated occurrences looks like this:
I.e. reading this second table starting from the bottom row.
Daily maximum Hs
The daily maximum Hs for the selected time span is also displayed in a table below the persistence table.