Hi Khumla,
afaik, there is no Garmin Pilot III+. You should either have a Pilot III (the aviation version) or a III+ (non-aviation version).
If Pilot III is concerned, you can still update
Garmin: GPS III Pilot Updates & Downloads
and also buy some African map coverage:
https://buy.garmin.com/en-US/US/shop.../prod5224.html
It's a tiny and easy to use device, also good as a back-up with its battery power supply.