Which of the following winds is provided to the aircrew in true direction?

Locally reported surface winds from on-field observation resources provide the aircrew with winds that are measured directly at the airport or airfields. These observations typically reflect the actual wind conditions experienced at the location, reported in terms of true direction. This information is crucial for flight operations, particularly for takeoff and landing, as it allows flight crews to understand the wind's impact on aircraft performance.

The other options, while relevant to wind observations, may not provide information in true direction or may not be as precise for local conditions. For instance, surface winds transmitted on a long line might represent averaged conditions over a broader area, which may not accurately depict local variations. High-altitude weather balloon data primarily indicates wind conditions aloft and can be subject to significant change before reaching the surface, while satellite data offers a broader overview of wind patterns but lacks the localized precision needed for aircrew operations. Therefore, the localized reports are the most reliable for accurate operational planning in aviation.