When planning entry into a given airspace, what decision is guided by weather minimums?

• A. When planning entry into a given airspace to determine if flight can proceed under VFR or IFR and what clearance is needed.
• B. When selecting color of the aircraft.
• C. When choosing the airport's runway length.
• D. When computing fuel consumption only.

Answer: (A)

Weather minimums tell you the lowest conditions under which a flight can legally enter a given airspace. They determine whether you can proceed with VFR or must operate IFR, and thus what kind of ATC clearance is required. If the observed or forecast weather meets the VFR minimums for that airspace, you can plan to enter under VFR with the appropriate ATC communications and clearances. If the weather is below those minimums, you would plan for an IFR flight and obtain an IFR clearance to enter, since IFR operations are conducted under ATC control. The other options aren’t governed by weather minimums: the color of the aircraft, the runway length needed, or fuel consumption calculations aren’t dictated by weather minimums for entry planning.