Actually, it always screams out to me, HFP Poston's Sliding 8 for adjustable eye;
in loaded use sliding and 8 are misnomers >> that are actually more helpful to understand the tying, rather than the loaded phase.
We remember the 8 dutifully made in the rope's as poured from the more liquid form while in hand.
Thus, our mind associates it in the loaded form as an 8 component working for us.
Just as faithfully make and reference HH in Sheepshank that in loaded use can roll out of the lock form HH w/90degree shelf
BUT rollout to a 360 non locking, no arc90 shelf form, that is certainly more failure prone
(pic).
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As like in actual LOADED, where forms from most liquid to most rigid now, usage of HFP 8, morphs to more of a Bowline to me in this LOADED form.
We now see a HH type 90 shelf in the most rigid part of the rope (other than SPart, that directly feeds)
>>it makes a nipping loop(that is made then lost in Sheepshank, opposite of not made then created here) , that the BE gets choked by (as like in Bowline)
>>after an arc180 across the fig8 Xing(instead of around SPart like Bowline)
BUT while doing so, also adds hard nip to that fig8 Xing
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The HH function is more like a terminating(hitch) than continuing(prefacing bend like coupler) at this point,
but yet just continues as a long way home, like fig8 style HH /thru extra arc
"ABoK Lesson#1666. A FIGURE-EIGHT HITCH is more secure than the HALF HITCH,
particularly if the encompassed object is small." >> small like 1 or 2 rope parts?
before continuing downward as normal continuous HH would.
To that view is even more continuous HH-ish
The extra long way home (Supertramp path) w/extra arc also affords another nipping loop, pre-fixing the main nipping loop.
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In time of proving, perhaps shine remaining thru enough tests to upgrade from utility class to rescue ready class;
especially if gets another stop/lock added.