Skip to content

← Where the theory applies
Loop — fixed

Cat's Paw

Interlock

Does not pick a knot

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

Cat's Paw, finishedCat's Paw, finished

Finished structure

Drawn from a rope model of this knot: which strand passes over which comes from where the rope actually lies.

Failure modes

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

Loop-to-loop family

A loop that either stands as a dropper or handshake onto another loop.

  • !Dropper loop collapsed into an overhand
  • !Handshake twisted so one loop saws the other
  • !Loop sized after it was already loaded
Fails when
  • !The turns cross or stack on each other, so one turn carries most of the load instead of all of them sharing it
  • !There is no double line behind the join, or the Bimini twist wraps have slipped
  • !Too few passes were made, so the load sits on fewer turns where the loops bear on each other
  • !One loop rides over the other, leaving a lopsided collar that catches on the rod tip guide
Geometry
  • Too few passes for the selected wind-on system

    Load is concentrated into fewer bearing points than the selected system intends

    Documented wind-on systems use repeated passes; this reviewed plate depicts five, while other makers specify fewer. · step 02

  • Turns riding over each other instead of nesting

    The advantage of spreading the load is lost

    Nested turns share the load; stacked ones do not. · step 03

  • Built on a single strand rather than a double

    The connection is limited by one strand of main line

    The paw transfers load between loops; it does not create strength. · step 01

  • Collar lopsided, one loop riding over the other

    Uneven bearing and a connection that snags at the tip guide

    A symmetrical collar is what lets it pass a guide and load evenly. · step 04

If you saw this
  • The connection has fewer repeated passes than the selected wind-on system calls for

    Check

    • ?Confirm the specified pass count; this teaching plate and the reviewed Salt Water Sportsman method use five

    Then

    • →Rebuild to the selected leader system's documented pass count and cinch the collar evenly
  • The turns sit on top of each other rather than side by side

    Check

    • ?Look along the collar for a turn riding over its neighbour

    Then

    • →Slack it off and re-cinch slowly
    • →Retie if the turns will not nest
  • The main line enters the connection as a single strand

    Check

    • ?Trace the main line back — two strands should run into the collar

    Then

    • →Build a Bimini first; the paw is only as good as the double under it
  • Too few passes for the selected wind-on system

    Check

    • ?Load is concentrated into fewer bearing points than the selected system intends
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.
  • Turns riding over each other instead of nesting

    Check

    • ?The advantage of spreading the load is lost
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.
  • Built on a single strand rather than a double

    Check

    • ?The connection is limited by one strand of main line
    • ?Inspect step 01

    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
  • ·Single-strand main line with no double built first
  • ·Light tackle where the doubled loop is bulkier than the job needs

Same pattern, different job

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

Sources