Chapter 3 · Lesson 5Practical demonstration · about 5 minutes
Joining two lines with a sheet bend
Learn the sheet bend and double sheet bend, then keep improvised joins away from jobs that require an approved continuous line.
Video coming soon
Joining two lines with a sheet bend
In the video
- The right shape
- When the double helps
- Do not improvise critical line systems
From the captain
Before you start
Sooner or later, a line will be just short enough to annoy you. That does not mean every two lines should be introduced to each other and sent off under load.
By the end of this lesson
Form and inspect a training join without mistaking it for an approved critical line system.
See it
See it for yourself
The sheet bend
Bight, through, round behind both legs, tuck under itself, dress. Seen from your side, with the bight in the larger or less flexible line.
5/5Dress the knot so both working ends finish on the same side.Ends on opposite sides differ from the demonstrated form. Retie it while it is unloaded.
Illustration only · Ryan's filmed demonstration and the vessel's method govern
Check the working ends
Identify the bight and both working ends. In the demonstrated form they finish on the same side.
Both working ends finish on the same side. This is the demonstrated form.
Illustration only · Ryan's filmed demonstration and the vessel's method govern
What to look for
Inspect the finished form
Identify the bight and both working ends; check they finish on the same side in the demonstrated form.
Choose the job as carefully as the knot
Material, diameter and condition affect a join. A sheet bend is not a substitute for a specified mooring, towing, lifting or safety line.
The lesson
The lesson
- 01
The right shape
Form a bight in the larger or less flexible line. Bring the other line through the bight, around both legs and tuck it beneath its own standing part. Dress the knot so both working ends finish on the same side.
- 02
When the double helps
A double sheet bend adds another turn around the bight. It may be chosen when the lines differ more in size or grip, but the vessel's procedure decides whether the join is suitable at all.
- 03
Do not improvise critical line systems
A knot joining two lines is not a substitute for an approved mooring, towing, lifting or safety line. If the job carries a significant or dynamic load, stop and ask.
Where it goes wrong
Two dock lines are joined because one will not reach. The improvised join is treated as a normal mooring line and loaded dynamically. The real failure is not simply the knot; it is using an unapproved joined line for a critical job.
Your call
What would you do?
Pick one, then read the feedback on all three.
The situation
Two training lines have been joined, but the working ends lie on opposite sides of the bend.
Take it aboard
Tie and inspect: Sheet bend
Do this during your induction or first weeks, with the person responsible for your work.
Unloaded practice
Use a short training line at a stable bench. Ask an experienced crew member to check the finished form before practising independently.
- 01Use two contrasting short lines.
- 02Form the bight as demonstrated and tie the single bend.
- 03Inspect the ends and dress the join.
- 04Compare the double form only if Ryan includes it.
What a useful result looks like
- Identify the bight and both working ends; check they finish on the same side in the demonstrated form.
- You can name one unsuitable use and untie the unloaded example without rushing.
Stop: Training line only. No person, vessel, lifting system or live load attached. A knot exercise does not establish load capacity or operating authority.
Deckhand Foundation · Job card
Sheet bend: inspect and choose
From the lesson: Joining two lines with a sheet bend
- Task and required holding or release behaviour understood.
- Line and attachment suitable under the vessel's method.
- Identify the bight and both working ends; check they finish on the same side in the demonstrated form.
- Tail and finished form checked against the demonstrated method.
- Use limitations explained.
Use / limitation
Inspection feedback
Next repetition
Your vessel's procedures and senior crew come first. Nothing on this card is stored.
Quick check
Four decisions, then move on
This check confirms the principle. Your vessel's own induction still comes first.