It is possible to cache the base map tiles (up to 100 MB) before going to the field when Internet connection is available. They will remain on the device for 2-3 days depending on the usage of the temporary memory even if the app is closed or forced to quit, or even if the device is rebooted.
The recommendations to make it effective are the following. After planning the mission:
- Move all around the flight in order to load the surrounding tiles.
- Repeat it at different zoom levels. For high level of zoom make sure to cover the area under the flight.
- Wait a bit between each move to make sure the tiles are loaded properly.