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When are you required to have a destination alternate?
- If destination at ETA + and - 1 hour will be:
- Cig - <1,500' above lowest circling HAA or
- If no circling, then 1,500' above lowest published minimum or 2,000' above airport elevation
- Visibility <3 (or 2 more than appr min, whichever is greater)
When are you required to have a departure alternate?
When taking off from anywhere with less than landing minimums, an IFR departure alternate within 1 hour flight time is required.
What is the required weather for an alternate?
- Cig - 200' above HAT for appr to be flown
- Vis - 1SM or as published, whichever is higher
If you are required to have an alternate, how much fuel must you carry?
Fuel to destination + alternate + 30 minutes cruise.
Standard takeoff minimums:
- 1/2SM or 2400RVR
- Predicated on a 200ft/nm climb capability
PHI is allowed to depart an airport without weather, only after...
...the PIC (or another competent to supply appropriate observations) determines departure point is 1/2SM Day or 1SM night (VFR per 135.205).
PHI may use a destination without weather using...
- a weather source within 15NM, if available
- the Area Forecast
- altimeter setting source specified in the IAP
- and the IFR alternate must have onsite, NWS-approved weather