airship
Do you mean that no pre-determined procedures exist to cover this type of event?
Well, no. The event happened when procedures broke down. When you realise you have made a mistake and it looks like 2 aircraft are going to collide, there is absolutely no time or rational brain process available to go through a checklist.
A loose parallel would be this.
Say you are walking along the street, looking at a map and look up to find yourself about to bump into someone doing the same.
The other person looks up at the same time and you both instinctively turn to miss each other. What procedure do you go through to decide which way to turn?
More often than not, both people turn into each other, then both take correcting action and turn the other way into each other again. Most often, you will somehow miss. Occaisionally you bump into one another.
OK, very simplified. However I think it is a good example of the
"OH F 
K! " response when you realise the mistake and your sphincter starts twitching.