P Time
Penetration time to the UKADR (calculated with a little help from our Northern friends) was generally in the 2 hr 10 mins region so if you got cracking then it was absolutely possible to get the peices in play at the right time and place. As my learned friend ORAC has said, the tanker boys were always eager to get airborne well within their 2 hour limit. Depending on the situation, we could also reduce their RS - but my aging brain tells me that they were limited as to the time they could hold RS 10 (i.e. cockpit). Anyway, bottom line is that we didn't need the moon and stars to align to get the job done.