FIGURE 6.7: EXAMPLE OF HOCKLE IN 3 STRAND ROPEdamage depends on the size of the rope. Small ropes, less tban abou[ size 3 (24 mm diameter),
sbould be retired when there is evidence of significant ultraviolet damage. Larger ropes are nor-
mally nol as seriously damaged because only the yarns on the surface of [he rope are affected.
Araroid fibres are also vulneTable to ultraviolet rays. They are normally covered by jackets
of another material for protection. Tf the jacket is damaged and the aramid fibres exposed to
sunlight, deterioration may follow. If the jacketing of an aramid rope is damaged, i[ sbould
be repaired in accordance with the manufacturer's instructions.
Chemical damage
Some synthetic rope materials can be damaged by chemical attack. NyloD is affected by acids.
The produc[s of rust can be acidic and we,ake.n nylon. If a nylon rope has been significantly
discoloured by rust beyond the surface yams, the affected pori ion should be cut out or The
entire rope should be discarded.
Paints, paint thinners and even tbe fumes of paints and thinners can damage some synthetic
fibres. Ropes should not be stored in the same room as paints and thinners. If a rope has
become soaked in paint or .. hinners, it should be discarded.
Splices
The proper techniques for splicing common types of synthetic rope are described in seamanship
manuals and manufacturers' literature and are not covered here. Ropes should be spliced by
experienced personnel with reference to the applicable splicing instructions.