drogue
noun: restraint consisting of a canvas covered frame that floats behind a vessel; prevents drifting or maintains the heading into a wind.

No soy experta en kayaks, pero por la explicación que encontré me imagino que debe ser una especie de elemento que ayuda a dar la dirección al bote.

One option.

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Note added at 2 mins (2004-08-07 18:13:24 GMT)
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drogue [drəʊg]
noun
1 any funnel-like device, esp. one of canvas, used as a sea anchor

2 a a small parachute released behind a jet aircraft to reduce its landing speed
b a small parachute released before a heavier main parachute during the landing of a spacecraft


3 a device towed behind an aircraft as a target for firing practice

4 a funnel-shaped device on the end of the refuelling hose of a tanker aircraft, to assist stability and the location of the probe of the receiving aircraft

5 another name for: windsock
[ETYMOLOGY: 18th Century: probably based ultimately on Old English dragan to draw]


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Note added at 44 mins (2004-08-07 18:54:42 GMT)
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Jorge: Windsock es sinónimo de drogue dependiendo del uso. En español se le llama \"manga\" (de viento) pero no estoy segura de su uso con un Kayak...
Seguiremos investigando....suerte.