Originally Posted by lgaflyer

It doesn't matter what temp is, if you don't see centerline light, you cannot t/o 555, that's per opspec.

If you choose to hold, its up to you. Certainly depending on fuel. But then you have to calculate your bingo fuel. You can also certainly hold til you have a fuel emergency and then exercise emergency authority and shoot a CATII without autopilot. You can get away with anything til you red screen the sim. In real world situation when there is no tell how long I may be holding, I would divert and wait on the ground and can refuel if i need to than holding without autopilot and chance that something else might break.