Section 6 Particular requirements for multi-hull craft
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 3 General Requirements and Constructional Arrangements - Chapter 3 Control Systems - Section 6 Particular requirements for multi-hull craft

Section 6 Particular requirements for multi-hull craft

Parent topic: Chapter 3 Control Systems

6.1 General

6.1.1 The requirements for control systems of multi-hull craft are generally in accordance with the requirements of Pt 3, Ch 3, 1 General for mono-hulls.

6.2 Rudders

6.2.1 The scantlings for rudders are to be generally in accordance with Pt 3, Ch 3, 2 Rudders. Where the proposed rudder is of a novel design or the speed of the craft exceeds 45 knots the scantlings of the rudder and rudder stock are to be determined from direct calculation methods incorporating model test results and structural analysis, as considered necessary by LR.

6.3 Sternframes and appendages

6.3.1 Sternframes and appendages are to be considered on the basis of the Rules. Reference is also to be made to Pt 6, Ch 5 Special Features Pt 7, Ch 5 Special Features and Pt 8, Ch 5 Special Features for steel, aluminium alloy and composite construction respectively.

6.4 Fixed and steering nozzles, bow and stern thrust units

6.4.1 In general, the requirements are to be in accordance with Pt 3, Ch 3, 4 Fixed and steering nozzles, bow and stern thrust units.

6.5 Stabiliser arrangements

6.5.1 In general, the requirements for multi-hulls are to be in accordance with the requirements of Pt 6, Ch 3, 5 Single bottom structure and appendages, and Pt 6, Ch 5, 2.4 Surface drive mountings, Pt 7, Ch 5, 2.4 Surface drive mountings and Pt 8, Ch 5, 2.4 Surface drive mountings, dependent upon the material of construction.

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