Hello,
I’m reviewing IFR flight planning procedures. I’m aware of the 1-2-3 rule, in which +/- 1 hour from ETA, if the ceiling is forecasted to be less than 2000 AGL and visibility is forecasted to be less than 3 SM, an alternate must be filed. However, how does one go about anticipating what type of routing to expect from destination to alternate? Is that something which ATC will simply assign when I declare that I’m going to divert, or is that something which is included on my FAA Flight Plan (Block 8 or Block 13)?
Thank you for your help!
