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Where the theory applies
Loop — fixed

King Sling

Interlock

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Finished structure

No drawing of this exact knot yet. The written steps are the reference.

HTH · Reference layout

King Sling — finished-state checks, on the shared reference layout

King Sling — finished-state checks, on the shared reference layout
Hook the Horizon reference plate
Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

Fixed-loop family

A loop that stays the size you made, with a return that cannot cinch.

  • !Loop cinched around the hardware — action is dead
  • !Return path reversed, so it becomes a slip loop
  • !Fluoro in a lock that only behaves on mono
Fails when
  • !Lure passed through one strand of the double loop, so the knot pulls out into plain line
  • !Twists unwound before the lure goes through, so the pass has nothing to trap
  • !Closed dry or without the tag in the pull, so it sits lopsided and the tag creeps back in
Geometry
  • Wrong loop order

    A slip loop, not a King Sling

    Order is the lock on this doubled-line loop · step 01

  • Loop left larger than the system needs

    Bulk in the guides and a walk-prone eye

    This is a system loop, not a free-swing lure loop · step 02

  • Used as a free-swing lure loop

    Wrong job — pick a non-slip terminal

    King Sling is a doubled-line eye, not a Rapala · step 04

If you saw this
  • Loop slips or collapses

    Check

    • ?Loop stability under pull

    Then

    • Retie
    • Use Perfection Loop as alternate
  • Finished check failed — Loop closes to the eye

    Check

    • ?Fixed loop geometry preserved
    • ?Wraps ordered
    • ?Loop action free at the lure

    Then

    • Retie. Closed loop removes the free-swing action the knot is for.
  • Wrong loop order

    Check

    • ?A slip loop, not a King Sling
    • ?Inspect step 01

    Then

    • Retie. Do not dress a defective structure and call it seated.
  • Loop left larger than the system needs

    Check

    • ?Bulk in the guides and a walk-prone eye
    • ?Inspect step 02

    Then

    • Retie. Do not dress a defective structure and call it seated.
  • Used as a free-swing lure loop

    Check

    • ?Wrong job — pick a non-slip terminal
    • ?Inspect step 04

    Then

    • Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·A fixed loop is a standing eye. The collar or figure-eight body must survive a straight pull without becoming a noose.
  • ·Bowline and sheet bend are the same crossing pattern under different load. That identity is seamanship, not a reason for Decide to swap one for the other.

What topology does not predict

  • ·Fixed vs slipped is a load-path question. Invariants do not choose bowline over figure-eight.
  • ·Ring-loading and slack-shaking failure are physical. Topology does not grade them.
  • ·No UIAA or manufacturer number is inferred here.

Not for

  • ·A lure that must swing on a non-slip loop — this standing eye is a different job
  • ·Letting a climbing identity pick your fishing knot
  • ·Free-swing lure action (prefer non-slip lure loops)
  • ·Braid-only terminals and heavy shock leaders

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources