Yes,but we've all been there.
> two separate waypoints which – although geographically distant – had identical designators.
> two separate waypoints which – although geographically distant – had identical designators.
Also to be honest, shouldn't this have been better unit tested? Considering aviation is a ~ £60 billion industry for the UK.
We don't know how well it was tested. (unit or otherwise)
What we know that it has processed 15 millions of flight plans previously without revealing this flaw. So they must have got some things right.
Relying on it's unit tested strong systems does not make. There's a lot more to testing.
Entirely possible there was a unit test that confirmed the system would error out in this particular condition. This sounds more like a requirements issue.