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KA

← Where the theory applies
Loop — fixed

Perfection Loop

Interlock

DiagramsHow to tie it

Does not pick a knot

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

Schematic — the Perfection Loop family, shared by 4 knots in this catalogueFinished structure. A standing loop locked above so the loop stays open under load.
finished · schematic

A standing loop locked above so the loop stays open under load.

Finished structure

A standing loop locked above so the loop stays open under load.

HTH · Reference layout

Perfection Loop — finished-state checks, on the shared reference layout

Perfection Loop — 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
  • !Tag left outside the loops, so it is not trapped and the loop slips
  • !First crossing made in front of the standing line, so the knot pulls out under load
  • !Tag slips out from between the loops as the top loop is pulled through
  • !Tied in braided line, which is too slick to hold and slips free under pressure
Geometry

  • Loops stacked in the wrong order

    The eye inverts or becomes a slip loop

    Perfection lock is loop order, not wrap count · step 02

  • Wrong first-loop direction

    You tied a slip loop and called it a Perfection

    First-loop direction is the knot · step 01

  • Tag left outside the lock

    The eye never locks and walks under load

    The tag must be captured in the stacked loops · step 03

If you saw this

  • Loop slips or collapses

    Check

    • ?Compare to a trusted diagram step-by-step

    Then

    • →Practice with rope
    • →Retie carefully

  • Finished check failed — Loop collapses under light load

    Check

    • ?Loop size holds after seating
    • ?Final tuck sits in the classic perfection geometry
    • ?Standing line exits in-line with the loop

    Then

    • →Retie. A collapsed perfection loop becomes a weak overhand.

  • Loops stacked in the wrong order

    Check

    • ?The eye inverts or becomes a slip loop
    • ?Inspect step 02

    Then

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

  • Wrong first-loop direction

    Check

    • ?You tied a slip loop and called it a Perfection
    • ?Inspect step 01

    Then

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

  • Tag left outside the lock

    Check

    • ?The eye never locks and walks under load
    • ?Inspect step 03

    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
  • ·Creating a free-swinging lure loop at the eye (use Non-Slip Mono Loop)
  • ·Free-swing lure action — this loop is fixed once seated

Same pattern, different job

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

Sources