|Figure Eight Knot|
Good knots are easy to tie, are easy to untie, and hold well. A good
knot will not untie itself. In sailing vernacular, a knot is used to
tie a line back upon itself, a bend used to secure two lines together,
and a hitch is used to tie a line to a ring, rail or spar. A knot used
to secure a line to an object, such as a ring or eye, is a hitch. The
knots listed below are those most commonly used in boat operations.
A figure eight knot
is an overhand knot with an
extra twist. It will prevent the end of a line from feeding through a
block or fairlead when loads are involved. It is also easier to untie
and does not jam as hard as the over hand knot. This knot resembles a
figure eight and is also known as a stopper knot.
Called a square knot
by Boy Scouts, the reef knot
is one of the most commonly used knots in marlinespike seamanship.
Reef knots are primarily used to join two lines of equal size and
similar material. Reef knots do not effectively hold two lines of
different sizes or diameter. Caution should be used if the line is going
to be under heavy strain since the reef knot can jam badly and become
difficult to untie afterwards. Reef knots are best used to finish
securing laces (canvas cover, awning, sail to a gaff, etc.), temporary
whippings, and other small stuff.
The sheet bend
also known as becket bend
is a bend that joins two lines that are if unequal size and diameter
together. It is the best knot for attaching a line to an eye splice and
can be easily taken apart even after being under a load. When tying the
sheet bend the running parts should be left long because there is some
initial slip in the knot when the knot is first brought under tension.
The sheepshank is a type of knot that is used to
shorten a rope or take up slack. This knot is not stable. It can easily
just fall apart under too much load or too little load. The knot has several features that allow a rope to be shortened:
- It provides two loops, one at each end of the knot which can be used to pass another rope through
- The knot remains somewhat secure under tension; the coarser the rope the more secure it is (see Disadvantages, below)
- The knot falls apart easily when tension is remove
The bowline is a versatile knot and can be used anytime a temporary
eye is needed in the end of a line. It also works for tying two lines
securely together, though there are better knots for this. An advantage
of bowlines is that they do not slip or jam easily.
Labels: Safe Boat Operations