Downloading Weather Forecast

By default, TZ iBoat “streams” weather directly using an Internet connection (“Online” mode). This mode is very convenient when using TZ iBoat at home or within cell coverage. However, if you plan to be at sea without any Internet connection, you can download weather forecast for a pre-determined area at home before you leave by enabling the “Offline” mode from the Weather Settings under “Connection Mode”. Once the Offline mode is enabled, you can tap on the “TZ” button and select “Offline Charts and Weather”. Next, tap on "Weather Offline Data" to access the download interface.

Adjust the download area by panning and zooming the chart. Tap on the settings icon to specify the parameters you want to download:

If you want to keep the downloaded file as small as possible, you can adjust the “Resolution” and “Time Interval”. Decreasing the resolution slider (to the left) will decrease the spatial resolution. For example, the standard GFS model has a native resolution of 25KM. This means that there is one data point every 25Km. If you decrease the resolution, the data point will be further apart (every 50KM).
‎Decreasing the time interval slider will decrease the forecast interval. For example, the GFS model gives a forecast every 6H (in between each forecast, weather parameters are interpolated in time). If you decrease the time interval, you will decrease the amount of interval within the total forecast period (for example one forecast every 12H instead of one forecast every 6H).

Once you are satisfied with all the parameters and the download area, tap on the download button.