Every high and low water of the year, from the station's own harmonic constants. What you see is what prints.
Live preview. The print is the same drawing at 5400×7200 px, computed from NOAA station 8443970.
Boston, MA · NOAA 8443970
The sheet: tall, or the horizontal poster
Plus $19.00 shipping, shown again before you pay.
The till is closed while the print route is proven end to end. Nothing here charges a card.