Year of the Ox

Glider Column

August - Peter Smith

Looking up towards a cloud under which a large number of gliders were circling. There were at least 20 in the thermal at one time.
What's the collective noun for a group of gliders, a swarm, a column, or maybe a guild. There were at least 20 in the thermal at one time, and being unable to see them from the side, it was a worrying sight.
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