What is the required ceiling and visibility for alternate minimums in a non-precision approach?

The required ceiling and visibility for alternate minimums in a non-precision approach is specified as a ceiling of 600 feet and visibility of 2 statute miles. This standard ensures that pilots have adequate conditions to initiate an approach and land safely at an alternate airport. By setting the minimums at these levels, regulatory authorities provide a buffer that helps mitigate the risks associated with lower visibility and ceiling conditions, thus promoting safety during flight operations.

These minimums are established to take into account the ability of pilots to visually acquire the runway environment and align for landing under non-precision approach conditions, which do not offer vertical guidance like precision approaches do. The specified minimums are aimed at allowing pilots to make informed decisions while ensuring the robustness of safety protocols in variable weather situations.