Grand Stream

From Last Exile

The Grand Stream is an air current, continually rushing 120-knot(140 mph) storm that circles the center of the hour-glass shaped planet of Prester. The torrential storm always rages in the high altitudes of the skies of both Anatoray and Disith and is thought all but impassible – even giant capital ships must follow paths of relatively calm air current. If even a skilled pilot attempts to go into the torrents he has a great risk of getting lost, crashing, or being destroyed by the large hulking form of the Exile. Throughout the series, most believe attempting the crossing in a Vanship to be tantamount to suicide.