General Function:
- A knot that primarily uses the loop formed in its function
Loop knots in the NPCC syllabus:
- Bowline
- Manharness
- Tent Guy Loop
- Slip Knot
1. Bowline |
Function: Creates an unadjustable loop that does not jam or slip easily under severe strain
Practical Application:
Practical Application:
- To secure twine to the sleeve ring of a tent sheet
- A rescue knot, used in first aid and lifesaving. The bowline can be tied around a person's waist, and also can be tied with one hand.
Take note:
The variation shown on the left is commonly known as the cowboy bowline or the left-hand bowline. In this variation, the bowline is tied such that the working end ends outside the loop instead of being inside the loop. This variation is not preferred as it is perceived to be a weaker knot in terms of the breaking strength of the rope although studies have been inconclusive.
2. Manharness
Functions:
- To tie a loop that acts as a handle for hauling of objects
- Provides an alternative to tie a loop in the middle of the rope instead of at the end
3. Tent Guy Loop
Function:
- To create an adjustable loop to act as a pulley mechanism that will give a mechanical advantage in the tightening of guylines
Steps:
- Tie
a slip knot on the rope, ensure that the loop of the slip knot is tied with the working end
- Run
the working end under the peg and through the slip knot. Pull the rope towards
the peg.
- When the rope has
been pulled to sufficient tension, cross the working end under the peg again,
and secure with half hitches. Ensure that as many half hitches as possible are
tied above the slip knot, to ensure that the loop is as secured as possible.
Practical Application: Tying of guylines in pioneering
4. Slip knot
Note: This is the same slip knot as the one tied in Tent Guy Loop.
Function: Forms a loop that can be used for temporary / quick release purposes
Practical Application: Used in tent guy loop
How to check:
Function: Forms a loop that can be used for temporary / quick release purposes
Practical Application: Used in tent guy loop
How to check:
- Knot should untie when pulled on the working end
Fireman's Chair (not in syllabus)
Function:
- To lower casualties from higher ground to lower ground.
A common mistake is to tie overhand knots instead of half hitches around the bights. In the knot on the left, the bight on the right has been incorrectly reinforced with an overhand knot instead of a half hitch. Half hitches are preferred over overhand knots because:
- Half hitches have lesser gaps compared to overhand knots decreasing the tendency for the position of the hitch to slip and change the size of the loop
- Half hitches are easier to adjust compared to overhand knots, which are difficult to loosen and untie under strain
- Half hitches are easier to tie especially with very long ropes using loops however overhand knots have to be tied by threading the working end through the loop