Besides escaping the persistent snow squalls at lower altitudes, they were riding a wind current that gave them a ground speed of about 125 miles [200 km] an hour.
Selain terhindar dari badai salju pada ketinggian yang lebih rendah, mereka menunggang arus angin sehingga kecepatan terbang mereka mencapai kira - kira 200 kilometer per jam.