Name: Harmonic Tide
Rating: 4.9 (7 reviews)
Author: BIT60

Click here for a free trial or to purchase using an activation code: https://apps.garmin.com/apps/e0d62415-6ad7-4692-a70e-a5d49f0d61d1

CHOOSING YOUR TIDE STATION
Harmonic Tide finds the nearest station directly on your watch using an available location or coordinates you enter.

Prefer a fixed station? Look up your station number at https://bit60.de/harmonic-tide/stations.html, then open the Harmonic Tide settings in the Garmin Connect app, set "Tide station" to "Station number" and enter the number. The station loads directly. Only numbers from this list work, not numbers from NOAA, BSH or other services.

HARMONIC TIDE
Tide curve, sun arc and moon phase in one view. Real harmonic tide prediction, calculated directly on your watch.

FULLY OFFLINE
Tide predictions need no phone connection, internet, API key or subscription. All 2,653 stations across 113 countries and territories are stored on the watch and will receive regular updates. You only need your phone to change settings.

HOW IT WORKS
Harmonic prediction is the method official tide tables are based on. Each station stores its tidal constituents (about 24 on average), which the watch adds up to the tide curve. Spring and neap tides show up naturally. High and low water times are displayed to the minute. Accuracy varies by station and tidal conditions; differences from official tide tables can be larger, especially with flat or complex tides.

FEATURES
- Tide curve with high and low water times and heights
- Sun arc with sunrise and sunset
- Moon phase
- Optional info line with station name and water level
- Fast offline search across 2,653 tide stations
- Optional local correction with one high/low water pair from your local tide table (not available on Instinct 3 Solar, Instinct E, fenix 6S Pro, Descent Mk2S and first-generation MARQ)

THREE WAYS TO CHOOSE YOUR STATION
Station number: for your home harbour. Loads directly and stays fixed, even when you travel.
Automatic: for being on the move. Uses the last known position from your last GPS activity or available weather data. Checks for an updated location hourly and switches when a sufficiently closer coastal station is available.
Coordinates: for a place you are not at right now. Finds the nearest station using your entered coordinates.

Tip: in bays and estuaries the nearest station is not always the best match. Compare two stations with your local tide table.

"Waiting for location"? Start a GPS activity outdoors briefly, or simply use a station number.
Manual: https://bit60.de/harmonic-tide/manual.html

Tide data: TICON-4 by DGFI-TUM based on GESLA-4, CC BY 4.0.