ATS Tide Watch plots every active NOAA CO-OPS water-level station on an ocean basemap and turns each one into a live tide card. Select a station to see the latest observed water level in feet above mean lower low water, refreshed every minute, with countdowns to the next high and next low tide and a 72-hour curve that lays the last day of observed levels over NOAA's six-minute harmonic prediction. Great Lakes gauges carry no tidal datum and no predictions, so they fall back to lake level with a plain notice rather than showing a misleading curve.