San Diego Jam

A compact hitch or jam at the eye — fewer wraps, a different lock than a clinch barrel.

• !Lock never jammed to the eye — it is a loose hitch in disguise
• !Used on a small eye that cannot take the bulk of the jam
• !Confused with a clinch: the tag path is not a barrel tuck

• !Tag not passed back through the top loop, so the knot slips apart when pulled
• !Tag fed through a gap partway up the wraps, so the turns loosen
• !Knot left short of the eye, with its turns loose on the doubled line
• !Turns crossed over each other as the knot closed, so they cut into each other

• Missed the second loop pass

  Pulls off as a plain jam under load

  The outer loop pass is what locks the San Diego stack · step 04

• Crossed or reversed jam wraps

  Uneven load across turns, early failure

  Retention depends on parallel turns rolling down evenly · step 02

• Jam stack never butted to the eye

  Walks and abrades against hardware

  The stack must bear directly on the eye · step 05

• Stack never rolled down under wet tension

  Unlocked — slips under shock

  Roll-down is the San Diego lock, not a dry yank · step 05

• Knot slips off under a hard pull, leaving a curly tag

  Check

  • ?Confirm the tag exits the second loop, not just the first

  Then

  • →Retie with both loop passes, seat wet and slow

• Knot body sits proud and rattles at the eye

  Check

  • ?Count wraps: 6–7 on light line, 5 on heavy

  Then

  • →Drop a wrap and seat harder on the standing line

• Finished check failed — Too few wraps for braid

  Check

  • ?Long ordered wrap column for the material
  • ?Clean seat after the final tuck
  • ?No reverse wraps

  Then

  • →Retie. Short wrap count on braid is a common San Diego Jam failure.

• Missed the second loop pass

  Check

  • ?Pulls off as a plain jam under load
  • ?Inspect step 04

  Then

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

• Crossed or reversed jam wraps

  Check

  • ?Uneven load across turns, early failure
  • ?Inspect step 02

  Then

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

• Jam stack never butted to the eye

  Check

  • ?Walks and abrades against hardware
  • ?Inspect step 05

  Then

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

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

• Pitzen Knot
• Jack’s Knot
• Jansik Special
• Centauri Knot