What is the required visibility to file for an alternate airport in the same timeframe?

To file for an alternate airport under FAA regulations, the required visibility is 2 statute miles in addition to meeting the minimums for the intended approach. This guideline ensures that pilots have sufficient visibility to conduct a safe approach and landing at the alternate airport if needed. The 2 statute miles are a baseline visibility requirement that take into account potential variations in conditions that could affect safe operations.

The additional criteria of meeting the minimums for the intended approach means that pilots must also be aware of and adhere to the published minimums associated with the specific approach they intend to use when landing at the alternate airport. This combination of visibility and approach minimums provides a buffer against unfavorable conditions and enhances safety in the decision-making process when it comes to alternate airports.

The other options present higher visibility requirements or different parameters that do not align with the established regulations for alternate airport filing. Understanding this requirement is crucial for flight planning and ensuring safety during flight operations.