"Hm, it could be. However in their 11 years of being with me they haven't done anything to show they're a threat to me, however they also seem to follow everything i say in unwavering loyalty. If i were to tell them to burn down cities and slaughter the civlians i have no doubt they'd obey. But anyway, tell me what exactly concerns you?"
I mean, the fog there was so bad, you could only see like, 3 or 5 yards out. So maybe they couldn't see?
Still they could manage using thier instruments and input from the piolets. A runway collision most likely only happens if clearances are given out wrong.