The ultimate book for tidal heights in Holland is" HP33". This detailed book on tidal heights offers also some information about the tidal streams: Each hour the directions and speed.
This year I discovered that this book is also available in a digital version " NLTides", offering much more possebilities AND information.
The CD introduces itself with this text:
HP33-NLTides provides the official height predictions for all significant porsts from Nieuwpoort in Belgium to lIST in Germany and tidal streams for the Southern North Sea, the Netherlands part of the Waddenzee, Schelde, tidal river area and main port approaches.
Compared with the Paper HP33, NLTides provides more ports, however the predicted tidal heights for the Netherlands ports ans streams information are consistent. The tidal height predictions for Belgium and Germany ports in NLTides are equivalent to the predictions of the UKHO tidal prediction software TotalTide.
HP33D-NLTides is an anual edition providing tidal predictions valif for one calender year. This software is available through the agents of the Royal Netherlands Navy Hudrographic Service (see www.hydro.nl)
What is there more to say after this introduction?
Well, I bought the CD and I am are very enthousiastic about it.
Of course the tidal information is the same as in the book and on www.getij.nl, except that the Belgium and German-part is added, but it is so much more detailed on the tidal streams. It is possible now to ask for the streams every minute, offering the possibility to make your route planning much more accurate. No interpolations anymore. It is also possible to zoom in or out to the required level of information.
Besides this I felt that I learned a lot, simply by zapping through the "time and tide" and thus visualizing what happens in fact with the changes of the streams during the tide. This is much, much more instructive than reading the diagrams in the book representing the sitations at intervals of only one hour.
As an answwer on Hans Heupinks comment I added below a picture of the tidal-current information in Germany
