Final answer:
An alternate airport must meet specific criteria to be considered as an alternative to the primary destination airport in aviation.
Step-by-step explanation:
In aviation, an alternate airport is a designated airport that can be used in case the primary destination airport is closed or unfavorable weather conditions don't allow landing there.
The minimum requirements for an airport to be listed as an alternate include:
Having adequate runway length and width for the aircraft.
Being equipped with appropriate navigation aids and communication systems.
For example, an alternate airport must meet the necessary criteria for the particular aircraft's performance capabilities and the prevailing weather conditions.