From Wikipedia ~
A monkey’s fist or monkey paw is a type of knot, so named because it looks somewhat like a small bunched fist/paw. It also looks somewhat like a volleyball or an older style football. It is tied at the end of a rope to serve as a weight, making it easier to throw, and also as an ornamental knot. This type of weighted rope can be used as an improvised weapon, called a slungshot by sailors. It was also used in the past as an anchor in rock climbing, by stuffing it into a crack, but this is obsolete and dangerous.
The monkey’s fist knot is most often used as the weight in a heaving line. The line would have the monkey’s fist on one end, an eye splice or bowline on the other, with about 30 feet (~10 meters) of line between. A lightweight feeder line would be tied to the bowline, then the weighted monkey’s fist could be hurled between ship and dock. The other end of the lightweight line would be attached to a heaver-weight line, allowing it to be drawn to the target easily.
The knot is usually tied around a small weight, such as a stone, marble, tight fold of paper, or a piece of wood. A thicker line will require a larger object in the center to hold the shape of the knot. Another variation of the monkey’s fist knot omits the use of an external object as a weight and rather uses the spare end which gets tucked back into the knot. This results in a nicer looking knot of a lesser weight, minimizing the potential danger of hurting someone with the knot when hauling line.
Monkey’s fists were also commonly used as melee weapons by sailors embroiled in street and tavern fights during the 19th century and the use of the monkey’s fist as a slungshot became common in the street gang subcultures of the 19th century. Similarly, when learning or practicing in the use of a Chinese meteor hammer, each end of the practice weapon is often tied off with a monkey’s fist knot.
Monkey’s fist’s are commonly used as a convenient and unobtrusive method of storing and transporting precious gemstones.
A monkey’s fist can be used on two ends of a tow lines of one side a fish net which is then thrown from one trawler to other, allowing the net to be cast and set between two boats so the trawl can be used between the two, in pair trawling where the tow or catch is negotiated between both parties. This makes it easier to catch fish given the greater surface area between both boats to turn around and catch missed fish from the sea much quickly. Once all fish have been hauled up from the sea, tow lines of the fish net is returned by way of thrown both monkey’s fists back to the host trawler. Alternatively, a monkey fist can be used as a weight of a heaving line thrown to over to an opposing ship to bring two ships together.
Click Here Monkey’s Fist Animation