ITCZ
ORP affecting slope guidance?? you may well be correct. I do recall it being discussed at on of the RAPAC meetings in my early days up here. RAAF have different ways of doing things you know.
Re where to touch down flapess, our SOP's say the 1st 10% of no factors and full length with all factors, whatever that means, so I guess 50' becomes insignificant in any case.