So, you can buy a GPS upgrade to the MI 8 and L 39.
Pretty cool right?
NO! It costs $14.99 AND because of it's develpment has probably set back other modules too.
Please for god's sake don't pay so much for something that is so redundant in the game. Sure F10 breaks the immersion somewhat, but at least you aren't enabling ED and freinds to put off development of proper modules and 2.5.
Here's the ED's webapage on it; https://www.digitalcombatsimulator.com/en/products/other/ns430/