I've got an interview coming up with a regional (Horizon) in a few days, and I'm trying to make sure I've got the rules for IFR alternates under part 121 figured out.
As I understand it, a departure alternate is required if the WX at the departure airport is below the landing minimums in the OpSpecs. The alternate must be within one hour single engine flying time of the departure airport, and the weather there must meet the requirements of the Opspecs.
A destination alternate is required if the WX at the destination is forecast to be below the minimums listed in the OpSpecs.
For the purposes of an interview (since I doubt Horizon expects interview candidates to know their Opspecs), I was assuming that a departure alternate would be required if the departure WX was below the lowest approach minimums, and the 1-2-3 rule would be acceptable to determine whether a destination alternate was required.
Aside from Opspecs, what would determine the takeoff minimums for a given airport? I'd assume that the Jepp 10-9 would list takeoff minimums, but I'm not sure which would apply if those two don't agree.
Am I understanding the alternate requirements here correctly, and is it reasonable to use the lowest approach minimums and 1-2-3 rule for the purposes of an interview?
As I understand it, a departure alternate is required if the WX at the departure airport is below the landing minimums in the OpSpecs. The alternate must be within one hour single engine flying time of the departure airport, and the weather there must meet the requirements of the Opspecs.
A destination alternate is required if the WX at the destination is forecast to be below the minimums listed in the OpSpecs.
For the purposes of an interview (since I doubt Horizon expects interview candidates to know their Opspecs), I was assuming that a departure alternate would be required if the departure WX was below the lowest approach minimums, and the 1-2-3 rule would be acceptable to determine whether a destination alternate was required.
Aside from Opspecs, what would determine the takeoff minimums for a given airport? I'd assume that the Jepp 10-9 would list takeoff minimums, but I'm not sure which would apply if those two don't agree.
Am I understanding the alternate requirements here correctly, and is it reasonable to use the lowest approach minimums and 1-2-3 rule for the purposes of an interview?