Bowline on the Bight MCQs Quiz | Class 9
This quiz is for Class 9 students studying NCC (Code 076), focusing on Navy Unit 3: Seamanship. The questions cover the topic of the Bowline on the Bight knot, including its basic elements, applications, and properties. Attempt all questions and click the ‘Submit Quiz’ button to see your score. You can then download a PDF of your answers.
Understanding the Bowline on the Bight Knot
The Bowline on the Bight is a highly versatile and reliable knot from the Bowline family. Its distinguishing feature is that it creates two fixed loops in the middle of a rope, rather than at the end. This makes it exceptionally useful for rescue operations, hoisting, and creating secure attachment points without access to the rope’s ends.
Key Characteristics and Principles
- Two Fixed Loops: The primary output of the knot is a pair of loops that do not slip or change size under load.
- Tied in the Bight: It is tied using a ‘bight’ (a loop or curve) of rope, meaning you don’t need the ends of the rope to be free. This is crucial in situations where the ends are already secured or inaccessible.
- Secure and Reliable: Like the standard bowline, it is known for its stability. It will not jam, even after being subjected to a significant load, making it relatively easy to untie.
- Rescue Application: It is often called the “rescue knot” because it can be used to fashion a makeshift bosun’s chair to lift an unconscious person. One loop goes around the legs and the other around the back/under the arms.
Basic Elements of the Knot
To understand how to tie the Bowline on the Bight, one must be familiar with these terms:
- Bight: A U-shaped section of rope, formed by bending the rope back on itself without crossing the ends. This is the starting point for the knot.
- Standing Part: The part of the rope that is not actively used in tying the knot; it typically leads to the anchor point or the main length of the rope.
- Working End (in this context): Refers to the bight itself, which is manipulated to form the knot around the standing parts.
Common Applications
The unique structure of the Bowline on the Bight lends itself to several practical uses, especially in naval and rescue contexts:
- Makeshift Bosun’s Chair: Its most famous application is for safely hoisting a person. The two loops distribute weight comfortably and securely.
- Sling for Hoisting Objects: The two loops can be placed around an object to create a stable sling for lifting.
- Equalized Anchor Point: In climbing or rigging, it can be used to create two attachment points from a single rope that help distribute the load.
- Isolating a Damaged Section: If a section of rope is frayed or damaged, this knot can be used to create a loop that isolates the weak spot, allowing the rest of the rope to be used safely.
Comparison: Standard Bowline vs. Bowline on the Bight
| Feature | Standard Bowline | Bowline on the Bight |
|---|---|---|
| Number of Loops | One | Two |
| Tying Location | At the end of a rope | In the middle of a rope (bight) |
| Primary Use | Creating a fixed loop at a rope’s end | Rescue, hoisting, creating mid-rope loops |
| Requires Rope Ends | Yes (working end) | No |
Quick Revision Points
- The Bowline on the Bight creates two secure, fixed-size loops.
- It is tied in the middle of a rope, not at the end.
- Its primary use case is in rescue situations as a makeshift seat or harness.
- The knot is stable under load and does not easily jam.
- It is a member of the reliable “Bowline” family of knots.
Extra Practice Questions
- Why is being able to tie a knot “in the bight” advantageous?
- Describe a scenario other than human rescue where a Bowline on the Bight would be superior to a standard Bowline.
- What could happen if the loops of a Bowline on the Bight were not properly “dressed” or tightened before applying a load?
- Can the size of the two loops be adjusted relative to each other? If so, how?
- Why is this knot considered safer for lifting people than two separate single-loop knots?
