Barry, If they were structurally identical then it would be possible to 'tramble' one form into the other.
Whoa : "tramble" was Mandeville's vehicle, and it takes paths
beyond what would be allowed to retain structural identity.
This (marling hitch or overhand knot around an object) is one that we use regularly in maintaining a schooner's sails (Spirit of Dana Point) where we use it to secure the foot and head of the sail to the boom or spar respectively. The half hitch does not do the same job as the marling hitch in this application.
And yet here the two *knotted* (meaning "where the crossings are")
(rather) identical ! --it's just that in the one chosen
for surer gripping, the 2 ends (of 4) that go away crossing OVER
the other 2 do so by turning down around (pressing closer to)
the bound object, rather than running more evenly above it
to the next such binding. (This of some knots within the sequence.)
I admit to some uncertainty on what a half-hitch
for those put in for a series of HHs
in say Two HH & more
are much the same as "nipping loops", in contrast to what is done
in the common commercial-fishing binding with (my name)reverse ground-line hitching
--where spiral wrapping of the
bound objects (e.g., a clump of netting at its edge, bound to be
sort of *cordage* like to be in turn bound to a head line) will
regularly take a turn back under the spiral to haul down tight
upon itself (the half-hitch
), then immediately repeat this
in the opposite (original) direction, to lock; and the two steps
might be repeated one or more times, building the binding.
But I think I know what half-understanding