But the Challenger is Category D, so there are no circling minimums.
So I assume all those nice shiny Cat D speed machines shown parked on Goooogle Earth landed there with VMC below the MSA...
Years ago Gulfstream brought out an ASC (Aircraft Service Change) for the GIV that allowed the crew to change the aircraft category from D to C. It consisted of a credit card-sized piece of cardboard slotted into the co-pilots instrument panel. One side listed the reduced weight limitations to achieve Cat C performance, the other side; Cat D limits. You simply rotated the card in the slot to change category. The catch was that it had to be declared and recorded prior to take off. Couldn't be done in-flight. It allowed the GIV to get into airports (including KASE) that did not have Cat D minima by operating to Cat C limits with the associated payload/fuel and speed restrictions.
I'm guessing they did the same for the G450/GV/G550. It would explain
some of the heavier metal on the ramp as KASE.
For the Challenger drivers; Does the 601/604 have a similar option?