For our African charts the FIR boundary will be where charts are switched.

For example a flight from FLND to FLMA?

It should never be necessary to force-load a chart during normal flying. If you give me an example of where you mean, I can give you a definite answer.

So, where FIRs & land borders don't line up it may be necessary to force load a chart?

It's usually the FIR border with some notable exceptions, for example if you're within the channel islands class A that's considered to be both UK and French chart coverage. The chart load is triggered when you're about 10 minutes from the border of chart coverage.

Just a thought, does anyone know if it is the land border or the FIR that triggers the next chart upload? Sometimes the land & FIR borders do not coincide!

Just a thought, does anyone know if it is the land border or the FIR that triggers the next chart upload? Sometimes the land & FIR borders do not coincide!

That's not normal behaviour!

I found that when flying from one country to another the chart would not load for the upcoming country, even when flying through it! I just ended up flying through blue until I returned to the first country! The charts are all installed on the sd card. 

Using Windows explorer can you see the chart for France & Uk on the SD card? Also when you go to charts in SD mobile do you see both?

If yest to the latter, what happens when you try to force load an extra chart (say France). My guess is the software crashes  .. as a number of us have found. One workaround is to uncheck display of roads & rivers. This takes less memory.

If the charts are not put on the card during sync process (and you have asked that they are synced) then I think there is a manual way of transferring them but have never had to do it.

Between us I am sure we can help you.

David