Originally Posted by
DaveReidUK
Good thinking, what could possibly go wrong ...
Quite so unfortunately. In the past few years we have had a number of occasions where the TSO'd GPS navs have decided to go cross country biggly, in L/L and height, yet the ipad GPS was not affected. Each time we happened to be near a certain quite large workers paradise country that is a bit uppity over some rocks in a local pond. Ipads were rock solid and were correct by radar fixes, TSO'd units went away and eventually came to their senses when we were in an area of less inhospitable natives.