[jfewtr]

You have to key in the tidal diamond data yourself, using the table shown on the face of the chart. Unfortunately this data is not included as textual data in the chart files (it's just part of the raster image), so I cannot program the application to pick it up automatically. It's a bit tedious to do key it in, but you only have to do it once per chart because the data will be saved once you've done it. So for charts that you use often it's worth it.
Regards
Jon