Under which condition is a takeoff alternate required?

• A. WX is below CA mins
• B. Engine failure on takeoff
• C. Runway is contaminated
• D. ATC clearance is unavailable

Answer: (A)

A takeoff alternate is required when there is not enough assurance you can land at the destination after takeoff, so you need another designated airport to reach. The trigger is forecast or observed weather at the destination that is below the published landing minimums for the expected arrival time. In that case, a takeoff alternate must be planned within a certain distance to provide a safe option if landing at the destination isn’t feasible. Other scenarios, like an engine failure on takeoff, runway contamination, or lack of ATC clearance, involve different operational or regulatory considerations and do not by themselves create the need for a takeoff alternate.