2.1.1 The anchoring and mooring equipment is based on an Equipment Number, EN, which is to be calculated as given in Pt 3, Ch 5, 2.1 Equipment Number 2.1.2.
2.1.2 Mono-hull craft
2.1.3 Catamaran, Swath, SES and other twin hull craft
2.1.4 Trimarans
2.2.1 Where a craft is of unusual form and proportions the requirement for equipment will be individually considered on the basis of the Rules.