The
Rattlesnake Tie is in actuality Clifford W. Ashley's
Over-And-Under Heaving Line Knot, or ABOK #541.

That said, the
Rattlesnake Tie is a whole lot easier to say
and remember, so I use that name here.

It derives from the look of the rattlesnake tail. Or, more
specifically, the series of nested, hollow scales that form
the tip of the tail.
Video Link: http://www.youtube.com/watch?v=UhO_j65tWSQ Hope you enjoy,
JD ~ TIAT