Cruising among the flight levels in excess of Mach 0.82 most times, our weather radar typically remained in an active status. The Boeing 777′s system was sophisticated enough to adjust its sweep to the attitude of the airplane and turn itself on during takeoff for predictive wind-shear-detection warnings. It was the primary long-range tool for in-flight convective-weather avoidance and often the reason for the statement, “Unable a heading of…”
ADS-B vs SiriusXM
Key Takeaways:
- The author, a former airline pilot, compared SiriusXM and free ADS-B (FIS-B) weather services for general aviation, seeking reliable in-flight weather data after transitioning from aircraft with sophisticated onboard radar.
- SiriusXM demonstrated several advantages over ADS-B, including the ability to display weather before takeoff, more detailed convective weather (like lightning at lower altitudes), better storm motion animation, and features such as echo-tops and trend-vectors for estimating storm severity.
- While ADS-B offers a largely similar weather picture for free, the author concludes that a SiriusXM subscription is a worthwhile investment due to its enhanced safety features and additional data, recommending pilots use both services in conjunction for a comprehensive weather-planning toolbox.
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