What Is This Thing Flapping Around?

Date:         17 Dec 99 01:58:02 
From:         donrm@sr.hp.com
Organization: Agilent Technologies, Sonoma County
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While watching a documentary on air safety the other night, I saw
a two-engine widebody airliner rotating on takeoff with what appeared
to be an HF antenna drogue chute wildly whipping around in the tail
vortices.

Is this normal practice to leave these deployed during airport
operations?  Or was I seeing something else?

Don Montgomery
Santa Rosa, CA
donrm@sr.hp.com