20.3.1 The length of anchor cable attached to an anchor
should be appropriate to the area of operation but generally should be not less than 4 ×
the vessel's mean length or 30 metres, whichever is the longer, for each of the main and
kedge anchors. (For a definition of mean length see Note 4 of Table 1).
20.3.2 The cable for main anchors and for kedge
anchors may be of chain or rope.
20.3.3 When the anchor cable is of fibre rope
or wire, there should be not less than 10 metres or 20% of the minimum
required cable length, whichever is the greater, of chain between
the rope and the anchor. Where the anchor cable is wire then proposals
to substitute the chain tail by an anchor and/or chain of enhanced
mass will be considered to the satisfaction of the Certifying Authority,
with special attention paid to the anchor performance, i.e. catenary.
20.3.4 The strength, form and material of the
anchor cable and its attachments to the anchor and the vessel should
be approved by the Certifying Authority.
20.3.5 Anchoring systems incorporating a windlass
should have the bitter end of the cable secured to the vessel's structure
and capable of being released in an emergency.
20.3.6 Anchor steel wire rope is to be fitted
with thimbles at both ends.