Yearly tide prediction files for the Connect IQ app "Tide Almanac: Offline Tide Tables" for Garmin watches, shown on the watch as "Tides". Each file holds the high and low tides of one station for one year, taken from the official source below. The watch downloads the file once and works offline afterwards.
| Source | Area | License and credit | Datum |
|---|---|---|---|
| NOAA CO-OPS | United States and territories | Public domain (terms) | MLLW |
| Centro de Hidrografia da Marinha (CHM) | Brazil | Used with authorization from CHM | NR |
| ©Kartverket (Norwegian Mapping Authority, Hydrographic Service) | Norway | CC BY 4.0 | CD |
| Marine Institute | Ireland | CC BY 4.0 | LAT |
| Bundesamt für Seeschifffahrt und Hydrographie (BSH) | Germany | Datenquelle: Gezeitenvorausberechnungen ©, Bundesamt für Seeschifffahrt und Hydrographie, Hamburg, 2026/2027 (terms) | LAT (SKN); NHN or BSCD2000 at some gauges |
| Rijkswaterstaat | Netherlands | CC0 | NAP |
Files were adapted to a compact format. BSH heights were converted from gauge zero to chart datum; Irish heights were converted from OD Malin to LAT. The Brazilian tables list times and heights only; each one is marked as high or low by comparing it with its neighbors. Times are shown in the station's local time, with daylight saving time where it applies. Tide times and heights are otherwise unchanged. The curve drawn between high and low tides on the watch is an estimate.
Predictions are astronomical. They do not include wind, pressure, storm surge, waves or currents. Do not use them for navigation or safety decisions.