NOAA Tide Prediction Dashboard · Depth-Calibrated · Station-Aware
The Fathom DSS-F1 acquires your position, identifies the nearest NOAA water-level station, and renders the tidal field for your coordinates. Water level is displayed in feet relative to Mean Lower Low Water. Coverage extends to US stations only. The sea does not negotiate.
| Data Source | NOAA Center for Operational Oceanographic Products and Services (CO-OPS) |
| Datum | MLLW — Mean Lower Low Water |
| Units | Feet (English) |
| Prediction Interval | 6-minute intervals, 240 data points per day |
| Interpolation | Catmull-Rom spline (cubic Bézier approximation) |
| Coverage | US NOAA reference tide stations only (~200 stations) |
| Location Detection | Browser Geolocation API; IP geolocation fallback (ipapi.co) |
| Station Selection | Nearest reference station by Haversine great-circle distance |
| Caching Policy | Session storage (cleared on browser close) |
| Time Reference | Station local standard/daylight time (NOAA lst_ldt) |
| Cat Compatibility | Not tested. Not advised. |
THE FATHOM DSS-F1 RELIES ON NOAA PREDICTION DATA PROVIDED WITHOUT WARRANTY OF ANY KIND. TIDE PREDICTIONS ARE THEORETICAL APPROXIMATIONS AND DO NOT ACCOUNT FOR STORM SURGE, SEICHE, TSUNAMIS, OR OTHER METEOROLOGICAL ANOMALIES. THE DSS-F1 IS NOT A NAVIGATIONAL INSTRUMENT AND MUST NOT BE USED TO PLAN MARITIME OR COASTAL OPERATIONS. THE CAT IS NOT RESPONSIBLE FOR UNEXPECTEDLY HIGH WATER. COVERAGE LIMITED TO US NOAA REFERENCE STATIONS. THE WORD "FATHOM" IS DOING DOUBLE DUTY AND IS AWARE OF THIS.