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A messenger line or just messenger is relatively light cordage used to pull a heavier cable across a gap or through a tube or duct. [1] [2] The term is also used for a line used to pull or lower a package along a downline or jackstay. [3] A heaving line is a rope with a weighted end which can be thrown relatively easily across a gap. If it is ...
Splices can be used to form a stopper at the end of a line, to form a loop or an eye in a rope, or for joining two ropes together. [1] Splices are preferred to knotted rope, since while a knot typically reduces the strength by 20–40%, [ 2 ] a splice is capable of attaining a rope's full strength. [ 3 ]
A bend for joining lines of different diameters. It is more secure than the heaving line bend or sheet bend due to the woven figure-eight knot "rackings". Reever Knot: A secure and compact bend. Sheet bend: A common bend for joining lines of different diameters. Shroud knot: A multi-strand bend used to join two ends of laid (or twisted) rope ...
The heaving line bend is a knot for securely joining two ropes of different diameter or rigidity. It is often used to affix playing strings to the thick silk eyes of an anchorage knot in some stringed instruments. In nautical use, the heaving line bend is used to connect a lighter messenger line to a hawser when mooring ships.
When a ship anchors in relatively deep water (greater than about 35 metres or 20 fathoms), the anchor and rope that is let down becomes drenched with water, becoming prohibitively difficult to raise again, even with a mechanism like a capstan. This ultimately limits the depths available with ordinary rope to within the weight bearing capacity ...
In stricter senses, the term wire rope refers to a diameter larger than 9.5 mm (3 ⁄ 8 in), with smaller gauges designated cable or cords. [1] Initially wrought iron wires were used, but today steel is the main material used for wire ropes. Historically, wire rope evolved from wrought iron chains, which had a record of mechanical failure.