DNV DNVGL-RU-SHIPS PART 3 CHAPTER 14 PDF

General

Basic assumptions

Vessels shall be provided with means for steering (directional control) of adequate strength and suitable design. The means for steering shall be capable of steering the ship at maximum ahead service speed, which shall be demonstrated.

Steering may be achieved by means of rudders, foils, flaps, steerable propellers or jets, yaw control ports or side thrusters, differential propulsive thrust, variable geometry of the vessel or its lift system components, or by any combination of these devices.

Requirements in this section are related to rudder and rudder design. For requirement to steering gear operating the rudder, see Pt.4 Ch.10 Sec.1.

If steering is achieved by means of waterjet or thrusters, see Pt.4 Ch.5 Sec.2 and Pt.4 Ch.5 Sec.3 respectively. Other means of steering is subject to special consideration.

All scantlings requirements given in this chapter are based on gross scantlings, hence the gross scantlings shall be equal or greater than these required gross scantlings.

This chapter applies to ordinary profile rudders, and to some enhanced profile rudders with special arrangements for increasing the rudder force. Rudders not conforming to the profile types included in this chapter will be subject to special consideration.

This chapter applies to rudders made of steel. Rudders made of material different from steel will be subject to special consideration.