Synthetic lines may slip when eased out under heavy loads since their coefficient of friction is below
that of manila. This may cause injury to personnel who have not been thoroughly instructed in these
lines' peculiarities. like two or three turns on a bitt before you "figure 8" the line; this provides closer
control. Stand well clear of the bitts.
It is important that synthetic line be used and maintained properly It should not be subjected to any of the
following common abuses.
b. Incorrect size of groove on drum or sheave
c. Drum or sheave grooves that have become rough or corrugated through wear
d. Inadequate diameter of drum or sheave
e. Inadequate radius on fairlead or stern roller
f. Rough or abrasive surfaces on fairlead or stern roller
g. Improper winding on drum
h. Exposure to corrosive fluids (oils, acids and bases)
i. Exposure to excessive heat or strong sunlight
j. Accumulation of dirt or grit on the surface of the line
k. Kinks or hockles.
It is important to line life to maintain a minimum and evenly distributed wear. Special attention should be given
to possible chafing points where the line passes over chocks, bitts, stern rollers, etc. Even though no particular
wear may be noticed, it is advisable to freshen the nip at least once per watch in order to change the location of
possible internal wear.
C-12 FIBER ROPE CHARACTERISTICS
Table C-2 provides the strength and weight of several sizes and types of fiber ropes. Manila line characteristics
are included for comparison. See NTSM 613, Section 2, for additional data on fiber lines.