[Paddlewise] floating tow rope

Salamander advertises that their tow ropes float, and are highly
visible.

In a recent workshop, a student made a presentation on towing with
a tow rope that sinks to the bottom, leaving only the storage bag
floating.

So, here is the question. Is it really an advantage that the length
of a tow rope floats? 

I can see one disadvantage. If the thing is floating all over the
surface, the chances of getting entangled with it are a lot higher.

opinions?

- Julio
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