Barnaby the Bear
Selective availability (degrading of the GPS signal) is only of the order of 200m which is still highly accurate for en-route navigation.
Bose-x
I agree entirely but it will never happen (GPS in the basic PPL). Can't be done, due to backward attitudes, lack of money to equip planes, lack of time in the 45-hour syllabus... It might happen as an add-on module.