For a flight to be dispatched under Exemption 17347, what must be considered in the TAF?

The correct choice emphasizes the importance of evaluating potential weather conditions that could be below minimums at the estimated time of arrival (ETA). This consideration is crucial because Exemption 17347 allows for some flexibility in weather minimums under certain circumstances, particularly when a flight is being dispatched to airports that may experience deteriorating weather conditions.

When assessing the Terminal Aerodrome Forecast (TAF), dispatchers must not only consider the current weather conditions but also forecasted developments that could affect the safety of the flight. If conditions are predicted to fall below the required minimums upon the aircraft's arrival, this presents a significant risk that must be addressed prior to dispatch. By ensuring that potential weather at the ETA is within acceptable limits, the safety of the flight is prioritized, allowing for informed decision-making regarding flight dispatch.

This choice reinforces the necessity of a thorough assessment of the forecast, beyond merely checking that conditions are currently acceptable, highlighting the dynamic nature of weather and its impact on flight operations.