DNV DNVGL-RU-YACHT PART 3 CHAPTER 7 [ Revised ]

General

Introduction

The requirements in this chapter apply to rudder, foundations and appendages necessary for satisfactory performing of the following functions:

— propulsion

— steering

— dynamic lift.

Such appendages are:

— rudders

— rudder posts

— shaft brackets

— foils.

Further, the requirements will include structural strength of hull foundations of above items, and appended propulsion units such as waterjets.

Requirements for steering arrangement are given in Sec.2 for metall rudders and Sec.3 for composite rudders.

Requirements for steering gear, hydraulic cylinders, rotating parts, propellers and impellers with shafting bearings for such are given in Pt.4.

Requirements for side thrusters and other appliances intended for manoeuvring or positioning purposes are given in Pt.4.

Documentation requirements

The documentation requirements are given in Ch.1 Sec.3.

Certification requirements

For products that shall be installed on board, the builder shall request the manufacturers to order certification as described in Table 1.