- Synthetic ropes may be used as the fLrst line ashore for posItIoning the ship at either end,
preferably by means of haodung and sLOrage winches. These ropes should oOt be considered
as contributing to the restraint of a vessel moored principally with wires. - When nylon tails arc fitted 10 wire ropes they should have an MBL at least 2511Jo i.n excess of
the wire, have a length of about 11 m, and be subject 10 rigorous examination and renewal
procedures, as recommended in Section 6. - Winches for handling the wire ropes may be either of the split drum or undivided drum (ype;
t.he relal ive merits of the two types are described in Section 7.3. - Automatic winches are not recommended, bUl if fined must have a capability to disengage the
automatic operational features. - Winch brakes should provide a minImum holding capacity of 60070 of tbe MBL of the wire
on the first layer of wire of a split drum winch and on the normal working layer of an
undivided drum winch. They should be maintained during service in order to retain their
efficiency. - The layout of moorings should be such as to provide:
symmetry about Ihe mid length aod (0 provide the design numbers of moorings on each
side of the ship,breast Unes sited as near as possible re the end of the ship,moorings used in the same service to be as nearly as possible of the same length inboard
of the ship,suitable chocks and fairleads to be provided in order to ensure correct alignment of
moorings,bilts to be positioned for supplementary moorings.- Minimum safety factors lis(ed in Table 4.3 are based upon the appropriate design criteria and
loading assumptions, and should be incorporated in all new equipment and mooring fillings. - All equipment and fittings should be clearly marked with their SWL.
J.l2.4 Recommendations jor Ship Operators
- The principles of good mooring, including (he dangers associated with mixed moorings, should
be understood by ship operators. Particular attention should be given in ship's instructions to
the proper application of winch brakes, the mainrenance of moorings aDd winch brakes, good
line tending procedures and the practices to be observed in the case of mooring emergeDcies. - Each ship should be provided with infonnation on the design of the mooring system, with
examples to show the loads Ukely to be experienced under particular conditions and to illustrate
those situations under which tbe limit of the system is likely to be reached.