Thanks Troll for explaining it so well. I've never understood our weather minima and have been afraid to ask any of my other pilot colleagues in case I showed my ignorance. I have always just followed the guy in front. Not much good when you are the only 7am departure on a weekend morning. In that event I always ask my co-pilot of he/she wants to operate P1 u/s so he/she has to make all the decisions and I just agree