The Shom will be closed from Friday, December 19th to Monday, January 5th, 2026.
We will not be able to purchase supplies during this period, except for Shom C cards, which we print directly at the bookstore.

Data sheet
Specific References
Admiralty Tidal Stream Atlases display, in diagrammatic form, the major tidal streams for selected waters of north-western Europe, including direction and rate at hourly intervals. Graded arrows illustrate Mean, Neap and Spring tidal rates in tenths of a knot. There is also a diagram to help you calculate the tidal stream rate for a given date.