main page

As a first step
we need a location. There are 3 ways to get this information:
  1. by hand: enter latitude and longitude as comma separated values into the text fields. Minutes or seconds are NOT supported at the moment!
    • longitude: you can use 360° values or from -180° to 180° where positive values mean east and negative values mean west
    • latitude: from -80° to 80° where positive values mean north and negative values mean south
  2. get local: you get the position automatically by your network provider or GPS
  3. Google Maps: you are able to select a worldwide location via Google Maps
Then,  you can do the calculation by pressing the calculation button. Be aware that location on land, lakes and rivers are not supported. You can get a proper calculation only close to the coastline or at sea inside the red rectangles that are shown in Google Maps.

message: No tide data
Sometimes the position does not work (e.g. Southampton
, some parts of French coast, Florida, North/South Carolina) because of low data material of that region. Then you should set the geo position 1 to 5 km away from your desired location into the open sea.

manual fine tuning:
The accuracy of this app depends on scientific material of different sources. That means that you get results of different quality for different areas. Please check the tide graph of your wrist watch to ensure the graph is correctly reflecting the tide situation based on the information in the newspaper, Internet or personal observation. For fine tuning
change the INT value in half-hour steps until it matches to the tide graph of your wrist watch.

menu/set time zone

Depending on the local time of your watch with respect to the Greenwich mean time (GMT) you can set the correct time zone.
The change of the time zone in this app does not touch the time zone of your Android system. Be aware of the daylight saving time. Check your wrist watch manual for how to handle the daylight saving time.

Display the version number and some information about this program

This manual (without pictures)

menu/go to homepage
Access the Lunitidal INT
homepage via your Internet browser

map page

Using integrated Google Maps
You can use the satellite map as known from Google Maps for shifting and scaling the map.

menu/search location:
Set a position on the map that corresponds to the entered search term, which may be a place name such as "Westerland, Germany", an address such as "1600 Amphitheatre Parkway, Mountain View, CA", an airport code such as "SFO", etc. If the location is known, the map is automatically re-centered to that point.

menu/set geo position
After centering the map to your
desired location by using the central red dot, you can set and save that position for further calculations. The last position will be saved for the next start of the app.